Eyebar goby
Gnatholepis anjerensis
A small and peaceful benthic Indo-Pacific goby, characterized by golden eyes and sandy camouflage. It spends its days continuously sifting sand to find tiny edible organisms.
Temperatura da água
22 - 27 °C
Valor de pH
8.1 - 8.4
Tipo de água
Marinho
Nível do tanque
Parte inferior
Tamanho adulto
8 cm
Volume mínimo do tanque
>= 100 L
Grupo mínimo
>= 1
Descrição da espécie
Geographical Origin and Habitat:
This species is widely distributed in the tropical Indo-Pacific, from the Red Sea and East Africa all the way to Hawaii and the Marquesas Islands. It inhabits coastal lagoons and reef flats at depths between 1 and 15 meters.
Taxonomy and Morphology:
Belongs to the Gobiidae family. It has an elongated, cylindrical body with a rounded head and protruding golden eyes. It reaches a maximum length of about 6-8 cm. Its pelvic fins are fused to act as a suction cup.
Social Behavior:
A peaceful and strictly benthic marine fish. It spends its time sifting through the fine surface sand with its mouth to feed, filtering organic particles and expelling sand. It is not aggressive towards other fish.
Coloration and Sexual Dimorphism:
The sandy coloration with golden, brown, and silver spots perfectly camouflages the fish on the bottom. It features a prominent dark vertical line running through the eye, giving it the common name eyebar goby.
Cuidado, criação e companheiros de tanque
Aquarium Setup:
Requires an aquarium of at least 60-80 liters. A layer of fine, soft sand (3-5 cm) is indispensable to accommodate its natural sifting behavior.
Diet and Feeding:
Feeds on micro-invertebrates and benthic detritus. In the aquarium, it readily accepts frozen foods like brine shrimp and mysis. Over time, it adapts to dry micro-granules.
Water Quality:
Maintain stable parameters: temperature 22-28 °C, pH 8.1-8.4, and specific gravity 1.020-1.025. Ensure efficient filtration with moderate flow at the bottom.
Compatibility and Cohabitation:
Ideal for peaceful community tanks. Fully reef safe, it lives well with clownfish, cardinalfish, and small wrasses. Avoid large or predatory tankmates.
Aquarium Breeding:
Breeding in the aquarium is extremely complex. They lay adhesive eggs under a rock, protected by the male. Pelagic larvae require complex rearing protocols.
Risks and Diseases:
Risk of starvation if housed with fast-feeding fish that consume food before it reaches the bottom. Use non-sharp sand to prevent mouth injuries.
Origem e distribuição geográfica
This species is widely distributed in the tropical Indo-Pacific, from the Red Sea and East Africa all the way to Hawaii and the Marquesas Islands. It inhabits coastal lagoons and reef flats at depths between 1 and 15 meters.
Origem
Oceanos tropicais e recifesÁfrica e Madagascar
Perfil de peixe
- Temperamento
- Territorial
- It is a peaceful, shy, and cautious fish that prefers to stay close to the safety of its established burrow. While it will bravely defend its immediate territory from other bottom-dwellers, it ignores fish swimming higher up. Providing plenty of rubble and a quiet environment helps it feel secure and behave naturally.
- Dieta
- Carnivore
- It is an active sand-sifter, taking mouthfuls of substrate to extract tiny benthic invertebrates, detritus, and microfauna. In the home aquarium, its diet should be supplemented with sinking pellets, frozen mysis, and chopped meaty foods. Ensuring a mature sand bed is present is vital for its long-term nutritional needs.
- Expectativa de vida
- 3-5 years
- Tamanho adulto
- 8 cm
- Proporção sexual
- Solitary
- There are no obvious external differences between males and females, making sexing this species visually almost impossible. They are best kept singly or as a confirmed mated pair to avoid territorial disputes. Placing multiple unsexed individuals in a small tank usually leads to aggressive territorial battles over burrow sites.
- Frequência de alimentação
- Twice daily
- Feeding small portions two to three times daily is recommended to mimic its natural, continuous foraging behavior. Because it rarely ventures far from its burrow, targeted feeding near its home may be necessary in a busy tank. Care should be taken to ensure it gets enough food without overfeeding the entire system.
- Carga biológica
- Low to Medium
- This species has a minimal impact on the overall bioload of the aquarium due to its small size and sedentary lifestyle. It produces very little waste compared to more active, open-water swimmers. Routine maintenance and standard filtration are entirely sufficient to keep the water pristine.
- Fluxo
- Moderate
- It favors gentle to moderate water flow, reflecting the calm sandy bottoms and rubble zones it inhabits in the ocean. Exceedingly strong currents can collapse its delicate burrow and make feeding difficult. A well-planned, indirect flow pattern allows the goby to thrive while keeping detritus from accumulating.
- Risco de salto
- Yes
- Like most gobies, this fish is easily spooked and possesses a strong instinct to jump when frightened or chased. A tight-fitting lid or a fine mesh cover is absolutely necessary to prevent it from leaping out of the aquarium. Keeping it in an open-top tank is highly risky and often ends poorly.
- Reprodução
- Oviparous
- Captive breeding of this species is extremely rare and technically demanding, primarily due to the difficulty of raising its microscopic pelagic larvae. In their natural habitat, they are substrate spawners that lay adhesive eggs deep within the safety of their burrow. The male takes on the responsibility of guarding and oxygenating the eggs until they hatch.
- Compatibilidade e companheiros de tanque
- Community
- This species is remarkably peaceful and makes an excellent addition to standard reef or fish-only aquariums. It spends its time sifting through the sand, ignoring most other fish and invertebrates. It should not be housed with aggressive bottom-dwellers that might outcompete it for food or territory.
- Nível do tanque
- Bottom
- This bottom-dwelling fish spends the vast majority of its life resting on the sand bed or hovering just outside its burrow. It relies heavily on a deep sand substrate to create its home alongside its symbiotic shrimp partner. It will only dart higher into the water column momentarily to grab a passing morsel of food.
Modelos e parâmetros científicos
FishBase
Acesso aos dados científicos oficiais da espécie
FishBase v25.04Dados sincronizados em: 15/06/2026
- Nível trófico
- 3,4 ± 0,5 se
- Resiliência
- Alta (menos de 15 meses)
- Unicidade filogenética (PD50)
- 0.501
- Relação bayesiana comprimento-peso
- a = 0.01023, b = 3
- VulnerabilidadeVulnerabilidade baixa (10 / 100)
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