Green Coral Goby



Green Coral Goby, Gobiodon histrio

  • Common Name: Green Coral Goby
  • Latin Name: Gobiodon histrio
  • Distribution: Native to the Indo-Pacific region, including the Great Barrier Reef in Australia, the Maldives, and the Red Sea.
  • Max Size: Up to 3 inches (7.6 centimeters)
  • Temperature Range: 77-82°F (25-28°C)
  • pH Range: 8.1-8.4
  • KH Range: 8-12 dKH
  • Care Level: Moderately difficult (delicate)
  • Lighting Preference: Moderate to high lighting
  • Preferred Food: Zooplankton, marine-based frozen foods, and occasional live foods
  • Behaviour: Peaceful, territorial
  • Suitable for Reef Tanks: Yes, as they form symbiotic relationships with certain coral species
  • Interesting Facts: Green Coral Gobies are protogynous hermaphrodites, meaning they can change sex from female to male as they mature.

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The Green Coral Goby, Gobiodon histrio, also goes by the name Broad Barred Goby. This is a captivating species that adds a vibrant touch to any aquarium. These small fish typically reach a maximum size of around 3 inches (7.6 centimetres). With their striking colours and unique body shape, they are a delightful addition to any marine tank.


The Green Coral Goby belongs to the genus Gobiodon, which is a part of the family Gobiidae. This family includes a wide range of fish species known for their small size and remarkable adaptability. The closest relatives of Gobiodon histrio are other members of the Gobiodon genus. The name “Gobiodon” is derived from the Greek words “gobius” meaning “gudgeon” and “odon” meaning “tooth,” referring to their small, numerous teeth.

Natural Habitat

In the wild, the Green Coral Goby inhabits coral reefs in tropical waters. These reefs are known for their vibrant colours and diverse marine life. The goby can be found dwelling near the base of coral colonies, where it seeks refuge and feeds on zooplankton. Its natural habitat is a mesmerizing underwater world, filled with coral formations of varying shapes and sizes, swaying with the ebb and flow of the ocean currents.

Keeping Green Coral Goby Healthy:

The care level for the Green Coral Goby is considered moderate, making it suitable for intermediate aquarists. A well-maintained tank with stable water parameters is essential for their well-being. Regular water testing, appropriate filtration, and temperature control are crucial to ensure their health. Maintaining a peaceful environment with minimal aggression from tank mates is also important for their overall welfare.

Special Requirements and Feeding

The Green Coral Goby, or Broad Barred Goby, has some special requirements to thrive in captivity. It is important to provide them with live rock or coral fragments, as they form symbiotic relationships with certain coral species. These structures serve as their refuge and aid in their feeding habits. Additionally, the goby is a carnivorous fish that predominantly feeds on zooplankton. Supplementing their diet with high-quality marine-based frozen foods and occasional live foods will help maintain their optimal health.

How Many Should I Keep?

Due to their territorial nature, it is recommended to keep only one Green Coral Goby per tank. These fish are known to establish small territories within their preferred coral or rock formations. Keeping multiple gobies in close proximity can lead to territorial disputes and stress.

Lighting Preference

The Green Coral Goby thrives under moderate to high lighting conditions. This mimics the bright and vibrant environment of their natural habitat. Providing appropriate lighting not only enhances their colours but also promotes the growth of beneficial microorganisms within the aquarium.

Suitable Tank Mates

When selecting tank mates for the Green Coral Goby, it is important to choose species that are peaceful and compatible with its territorial behaviour. Small, non-aggressive fish such as other gobies, small blennies, and certain damselfish can be suitable companions. However, aggressive, or larger fish should be avoided, as they may intimidate or harm the goby.

Reproduction in the Wild

The Green Coral Goby, scientifically known as Gobiodon histrio, follows a unique reproductive strategy in the wild. These fish are known to be protogynous hermaphrodites, which means they possess the ability to change their sex during their lifetime. Initially, they start off as females and can later transition to become males as they mature.

Breeding Gobiodon histrio:

Breeding the Green Coral Goby in captivity can be a rewarding experience. Here is a detailed overview of the breeding process:

  1. Set Up:

To create a suitable breeding environment, set up a separate breeding tank with appropriate water parameters. The tank should ideally have live rock or coral fragments, providing the gobies with ample hiding places and potential spawning sites. Maintain stable water temperature around 77-82°F (25-28°C) and salinity between 1.020 and 1.025 specific gravity.

  1. Courtship/Spawning:

When the conditions are favourable, courtship behaviour between a male and a female Green Coral Goby begins. The male goby initiates the courtship by displaying vibrant colours and performing intricate movements to attract the female’s attention. The pair then engages in a dance-like courtship ritual, swimming closely together around their chosen spawning site.

  1. Rearing:

Once the courtship is successful, the female Gobiodon histrio deposits her eggs onto a chosen substrate, usually on the underside of a coral fragment or in a crevice. The male goby then fertilizes the eggs externally. After spawning, it is crucial to remove the adults from the breeding tank to prevent them from consuming the eggs. The eggs will hatch within a few days, and the larvae will begin to develop.

Sexual Dimorphism

Sexual dimorphism in the Green Coral Goby is not readily apparent, as males and females have similar external appearances. However, during courtship, the male goby displays more intense colours and engages in specific behaviours to attract the female.


The Green Coral Goby, Gobiodon histrio, is native to the tropical waters of the Indo-Pacific region. It can be found in various locations, including the Great Barrier Reef in Australia, the Maldives, and the waters of the Red Sea. These regions offer the ideal conditions for the goby’s coral reef habitat.


The Green Coral Goby or Broad Barred Goby, Gobiodon histrio, is a fascinating fish species that exhibits unique reproductive behaviours. In the wild, they are protogynous hermaphrodites, transitioning from females to males as they mature. Breeding this species in captivity requires a well-maintained breeding tank, courtship rituals, and suitable conditions for egg deposition and larval development. The males display vibrant colours during courtship, while sexual dimorphism is not readily apparent in their external appearance. Green Coral Gobies are native to the Indo-Pacific region, particularly found in coral reef habitats. Breeding and observing the reproductive behaviours of these gobies can provide a deeper understanding of their intriguing life cycle.


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Dry Goods Delivery.

The store has provided information regarding their order dispatch and estimated delivery times. Here are the key details:

  1. Dispatch Timeframe: Orders placed before 2pm will be dispatched on the same day. Orders placed after 2pm will be dispatched on the next working day.
  2. Delivery Date and Time Guarantee: While the store aims to dispatch orders promptly, they cannot guarantee a specific delivery date and time. As the delivery process relies on couriers, there may be factors beyond their control that could affect the delivery timeframe.
  3. 1st Class Mail: For orders sent via 1st Class mail, the aim is to have them delivered on the next working day after dispatch.
  4. 2nd Class Mail: Orders sent via 2nd Class mail typically take approximately 2-3 working days for delivery after dispatch.
  5. APC Next Day Delivery: APC Next Day delivery is available for UK mainland postcodes. It is usually delivered on the next working day after dispatch. However, please note that items being delivered to more remote areas may require additional time for delivery.

It’s important to keep in mind that while the store strives to provide efficient delivery services, unforeseen circumstances or external factors could potentially impact delivery times. For further details or specific inquiries about delivery, customers should refer to the store’s terms and conditions or contact the store directly.

Livestock Delivery.

The store maintains specific policies regarding the delivery of livestock. Here are the key points:

  1. Licensed Livestock Courier: The store exclusively uses a licensed livestock courier for shipping fish and coral. This approach is chosen to ensure responsible and ethical transportation of the livestock.
  2. Livestock Shipping Fee: The livestock shipping fee charged to customers of £19.99 does not cover the true cost, and therefore, there is a minimum spend requirement of £30.00 before the option for livestock shipping becomes available.
  3. Pre-Arranged Delivery: The store never ships livestock without first arranging a suitable delivery day. Before dispatching the livestock, the store must confirm the agreed-upon delivery day with the customer.
  4. Saturday Delivery Confirmation: Customers who choose Saturday delivery must have their availability confirmed for the upcoming Saturday before the store sends out the livestock. This confirmation ensures that the livestock can be received promptly.
  5. Failure to wait for livestock: Not waiting for livestock, even if there is a reasonable delay, or cancelling an order after it has been dispatched will lead to you incurring charges for an emergency return to the base. Additionally, any losses of livestock will also be charged to you. Please be aware that the items you are ordering are living creatures – livestock. We kindly ask that you refrain from ordering livestock if you are unable to accommodate the possibility of a delayed delivery.

    These terms and conditions are a fundamental aspect of our policy. Our primary goal is to dissuade individuals who could react negatively to a delayed delivery and subsequently request order cancellations. It is of utmost importance to underscore that your order pertains to living creatures, not mere inanimate objects. In the event of an occasional delay, it is crucial that you respond in a rational and responsible manner, taking into account the welfare of the livestock. We kindly request that you refrain from placing an order for livestock if you tend to react strongly to such situations. By proceeding with the order of livestock, you indicate your acceptance and agreement to abide by these specified terms and conditions.

  6. Signature Requirement: Livestock deliveries require a signature upon receipt and cannot be left in a safe location. This precaution ensures proper handling and the well-being of the livestock.
  7. Geographic Restrictions: The courier has strict geographic restrictions for livestock deliveries. Unfortunately, deliveries to Northern Ireland, Republic of Ireland, Isle of Man, Isles of Scilly, Channel Islands, and certain Scottish offshore postcodes may not be possible. Customers are encouraged to contact the store via email to confirm if livestock delivery is available in their area.
  8. Minimum Order Value and Order Cancellations: The store has a minimum order value of £30 for livestock shipping. Additionally, the store reserves the right to cancel orders that are deemed high-risk or involve a high number of single tropical freshwater fish species.

It is essential for customers to familiarize themselves with these policies before making a purchase. For more detailed information or specific inquiries, customers should consult the store’s terms and conditions or reach out to the store directly for clarification.

Livestock Geographical Exemptions.

The store has specific geographical exemptions for livestock deliveries. Here is a list of the areas and postcodes where livestock delivery is not available:

  1. Islands: Livestock cannot be delivered to the Shetlands, Channel Islands, and Isle of Man.
  2. Postcodes: Livestock delivery is not available to the following postcodes:
  • AB30 to AB39, AB41 to AB45, AB51 to AB56
  • DD8 to DD10
  • BT all
  • DG3 to DG9, DG12 to DG14
  • KA18 to KA19, KA26, KA29 to KA30
  • HS all
  • IM all
  • JE all
  • ZE all
  • KW15 to KW17
  • TD9
  • FK17 to FK21
  • GY all
  • KA26, to KA28
  • PA20 to PA38, PA41 to PA49, PA60 to PA61, PA76 to PA78
  • TR21, to TR25
  • PH3 to PH26, PH30 to PH44
  • IV all

Customers residing in these areas should be aware that livestock delivery is not available to their location.

We can ship livestock to the Isle of Wight, this area is subject to a surcharge.

For further information or specific inquiries about livestock delivery to a particular area, customers are advised to contact the store directly for clarification.


According to the store’s policy, customers have the right to cancel an order within 14 working days of receiving the goods. To initiate the cancellation, the goods must be returned to the store in new and unused condition, adhering to their Returns Policy.

Important points regarding the return process are as follows:

  1. Return Condition: The goods must be returned in new and unused condition, as originally received. It is important to ensure that the goods are in the same condition as when they were sent out.
  2. Return Timeframe: The goods must be received by the store within 21 days of notifying them about the cancellation. During this time, customers are responsible for any loss or damage that may occur during the return shipping process.
  3. Refund Process: Once the store receives the goods in new and unused condition, they will initiate the refund process. The purchase price will be refunded to the customer.
  4. Return Condition Inspection: If the returned goods arrive in a condition that is less than what they were sent out in, the store reserves the right to return the goods to the customer, and no refund will be processed.

It is essential for customers to carefully review the store’s Returns Policy and follow the specified procedures to ensure a smooth and successful return and refund process. For more detailed information or specific inquiries, customers should consult the store’s terms and conditions or contact the store directly.


According to the store’s return policy, the following guidelines should be followed for returning goods:

  1. Use Returns Form: Customers need to use the store’s provided returns form to initiate the return process. This form helps the store acknowledge that the goods are being sent back.
  2. Return for Testing: If the goods are being returned for testing, the customer is responsible for covering the return shipping expenses.
  3. Refund of Postage Fees: The store will only refund postage fees if the order arrives damaged or becomes faulty within the first 4 weeks of purchase. Proof of posting is important, and customers should ensure the goods are well-packed and obtain proof of posting as the goods remain their responsibility until received by the store.
  4. Refund of Postage Costs for Replacement: If goods are being returned within 7 days of purchase under the Replacement Policy, the store can refund postage costs. However, the customer needs to agree on a delivery service with the store in advance, and only standard or tracked shipping fees will be refunded. The store cannot refund the cost of any special delivery service.
  5. Non-Refundable Postage: Postage costs for goods returned for any other reason than those mentioned above are non-refundable. The store reserves the right to deduct the original postage cost from any applicable refund.
  6. Mistaken Purchases: If a customer has made a mistake in their purchase, they need to return the goods to the store. The customer is responsible for the return shipping costs in such cases.

It is important for customers to carefully follow the store’s return procedures and terms and conditions. For further details or specific inquiries, customers should refer to the store’s website or contact the store directly.


If customers receive faulty goods, the following guidelines apply according to the store’s policy:

  1. Notification of Faulty Goods: Customers must notify the store within 7 working days if they receive faulty goods. This notification should be made as soon as possible.
  2. Replacement Parts: If possible, the store will dispatch replacement parts for the faulty goods.
  3. Return of Goods: If replacement parts are not possible, the store may request customers to return the faulty goods in accordance with their Returns Policy. The specific return procedures and conditions should be followed.
  4. Verification of Damage: Once the store receives the returned goods, they will verify the damage. If the damage is confirmed, the store will supply the required replacements.
  5. Return Postage Costs: If the goods returned to the store are found to be in good working order, the store is not able to refund the return postage costs. Additionally, the store reserves the right to deduct their original postage cost from any applicable refund.
  6. Consequential Loss or Damage: The store cannot take responsibility for any consequential loss or damage that arises directly or indirectly from the goods supplied.

Customers should carefully review and adhere to the store’s Returns Policy and procedures for returning faulty goods. For further clarification or specific inquiries, customers should consult the store’s terms and conditions or contact the store directly.

Manufacturer’s Guarantees

The store works in collaboration with manufacturers to ensure that their guarantees are honored, and they make their best efforts to resolve issues within the warranty period. The following guidelines apply to refunds and replacements:

  1. Postage Costs under Manufacturer’s Guarantee: Postage costs can only be refunded if the goods are returned to the store within 7 days of the original purchase, as per the manufacturer’s guarantee.
  2. Refund of Postage Costs for Faulty Goods: The store will refund postage costs for guarantee/warranty returns only if the product becomes faulty within the first 4 weeks of receipt.
  3. Replacements with Manufacturer Authorization: Replacements, whether parts or goods, can only be offered when authorized by the manufacturer. Customers should contact the store for further guidance in such cases.
  4. Prior Approval for Returns: Goods should not be returned to the store without prior approval. Customers need to contact the store and obtain approval before returning any items.
  5. Replacement of Glass or Ceramic Items: Glass or ceramic items can only be replaced if the store is notified within 48 hours of receiving the delivery.
  6. Replacement of Glass Bulbs/Tubes: Glass bulbs or tubes can only be replaced if they become faulty within 14 days.

Customers should note and adhere to these guidelines to ensure a smooth and efficient resolution of any issues with their purchased items. For specific inquiries or further information, customers are advised to refer to the store’s terms and conditions or contact the store directly.


According to the store’s policy, customers have the following responsibilities regarding breakages:

  1. Checking Goods on Arrival: It is the customer’s responsibility to thoroughly check the goods upon arrival for any damage. This should be done before signing for the parcel. If the parcel appears damaged, it is advised not to sign for it.
  2. Reporting Breakages: Any breakages or damages must be reported to the store within 48 hours of receiving the goods. It is important to promptly notify the store to initiate the resolution process.

By carefully inspecting the goods upon arrival and reporting any breakages within the specified timeframe, customers can ensure that appropriate actions are taken to address the issue. For specific instructions on reporting breakages or further information, customers should refer to the store’s terms and conditions or contact the store directly.