Green Clown Goby: Tank Size, Mates, Lifespan, and Temperament

Green Clown Goby

The Green Clown Goby, scientifically known as Gobiodon atrangulatus, is a vibrant and captivating fish species that has gained popularity among aquarium enthusiasts. With its striking appearance and peaceful nature, this small marine fish is a delightful addition to any saltwater tank. In this article, we will explore various aspects of the Green Clown Goby, including its size, gender differences, ideal tank setup, compatible tank mates, lifespan, and temperament.

Green Clown Goby

Green Clown Goby Size

The Green Clown Goby is a petite fish that typically reaches a maximum size of about 2 inches (5 centimeters). Its small stature makes it an ideal choice for nano or small-sized aquariums. Despite its small size, this fish is highly active and will constantly explore its surroundings, bringing life and movement to your tank.

Green Clown Goby Male and Female

Male and female Green Clown Gobies share many similarities in appearance, making it challenging to differentiate between the sexes based on physical characteristics alone. Unlike some fish species where males display vibrant colors or distinct patterns, the sexual dimorphism of Green Clown Gobies is not visually apparent.

To determine the gender of Green Clown Gobies, it is often necessary to observe their behavior and social interactions. In some cases, females may appear slightly larger than males, but this is not a foolproof method for sexing them. Therefore, the best approach is to introduce multiple Green Clown Gobies to the tank simultaneously and allow them to form pairs naturally.

Breeding Green Clown Gobies in a home aquarium is a complex process that requires specific conditions and careful monitoring. It often involves providing suitable spawning sites, such as caves or crevices within a live rock, where the female can deposit her eggs. Once the eggs are laid, both the male and female will take turns guarding and fanning them until they hatch.

Green Clown Goby Tank Size

To provide a comfortable habitat for a Green Clown Goby, a tank size of at least 10 gallons is recommended. This will give the fish ample swimming space while allowing you to incorporate suitable hiding spots and live rock formations for them to explore. A well-maintained tank with a stable environment will help ensure the health and happiness of your Green Clown Goby.

Green Clown Goby Tank Mates

Here are some compatible tank mates that can coexist harmoniously with Green Clown Gobies:

  1. Small Gobies: Species such as the Yellow Watchman Goby (Cryptocentrus cinctus) or the Banded Sleeper Goby (Amblygobius phalaena) make excellent tank mates for Green Clown Gobies. These gobies share similar peaceful temperaments and thrive in similar aquarium conditions.
  2. Blennies: Many blenny species, such as the Tailspot Blenny (Ecsenius stigmatura) or the Lawnmower Blenny (Salarias fasciatus), are compatible with Green Clown Gobies. Blennies are known for their quirky personalities and peaceful demeanor, making them suitable companions.
  3. Nano-sized Wrasses: Certain species of small wrasses, such as the Possum Wrasse (Wetmorella spp.) or the Carpenter’s Flasher Wrasse (Paracheilinus carpenteri), can coexist peacefully with Green Clown Gobies. These wrasses add vibrant colors and lively movements to the aquarium.
  4. Small Damselfish: Some species of damselfish, particularly those known for their peaceful behavior, can be compatible tank mates for Green Clown Gobies. Examples include the Blue/Green Chromis (Chromis viridis) or the Yellowtail Blue Damselfish (Chrysiptera parasema). However, it’s important to monitor their interactions to ensure no aggression occurs.
  5. Peaceful Shrimp: Certain species of peaceful shrimp, such as the Scarlet Skunk Cleaner Shrimp (Lysmata amboinensis) or the Peppermint Shrimp (Lysmata wurdemanni), can coexist with Green Clown Gobies. Shrimp add diversity to the aquarium and can engage in fascinating symbiotic relationships with other tank mates.

Green Clown Goby Lifespan

The duration of a Green Clown Goby’s life depends on various factors like the tank surroundings’ quality or the care received by it. Generally speaking, in an efficiently maintained aquarium, they may survive up to 3 – 5 years. The secrets behind extending their life span involve offering quality nutrition coupled with preventing circumstances that trigger stress levels greatly affecting their well-being positively.

green clown goby

The Temperament of a Green Clown Goby

With its mild manner, the Green Clown Goby is renowned for its peaceful temperament. It is a tranquil and non-combative fish that takes up residence in rock crevices or coral branches. As you may observe territorial behaviour towards other members of their species, they coexist amicably with other tank mates.

When it comes to feeding, the Green Clown Goby is a carnivorous species. They have small mouths with specialized teeth adapted for picking at small invertebrates and zooplankton. In a well-maintained aquarium, it is recommended to provide a varied diet consisting of high-quality frozen or live foods such as brine shrimp, mysis shrimp, and small-sized marine pellets. Offering a diverse diet will help ensure their nutritional needs are met and promote their overall health.


The Green Clown Goby, with its stunning green coloration and peaceful nature, is an excellent choice for both beginner and experienced aquarium enthusiasts. Its small size, coupled with its playful behavior, makes it an ideal addition to nano and small-sized tanks. By providing suitable habitats, compatible tank mates, and a balanced diet, you can enjoy the beauty and charm of the Green Clown Goby in your own aquarium.


1: Can I keep multiple Green Clown Gobies together in the same tank?

While Green Clown Gobies can coexist peacefully with other tank mates, it is generally advisable to keep only one pair of Green Clown Gobies per tank to avoid potential territorial conflicts.

2: Are Green Clown Gobies reef-safe?

Yes, Green Clown Gobies are generally reef-safe. However, caution should be exercised when introducing them to tanks with delicate corals or ornamental shrimp, as they may nip at the polyps or small crustaceans.

3: What water parameters are ideal for keeping Green Clown Gobies?

Green Clown Gobies thrive in saltwater aquariums with stable water parameters. The recommended temperature range is between 75°F and 80°F (24°C to 27°C), with a pH level of 8.1 to 8.4 and a salinity of 1.020 to 1.025.

4: Can Green Clown Gobies jump out of the aquarium?

Although not common, Green Clown Gobies have been known to jump out of uncovered tanks. It is essential to have a secure lid or mesh covering to prevent any accidental escapes.

5: Are Green Clown Gobies suitable for a beginner aquarist?

Yes, Green Clown Gobies are generally considered suitable for beginners due to their peaceful nature and ease of care. However, proper research and understanding of their needs are essential to ensure their well-being.

Recommended Reading: Neon Dottyback: A Guide to Tank Mates, Aggression, and Reef Safety

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