Sponge Goby

The Sponge Goby (Bryaninops spongicolus) is a small fish that resides in tropical marine environments, specifically among coral reefs. It has been observed at depths of up to 23 meters (approximately 75 feet). The maximum length of this fish is about 2.5 centimeters (roughly 1 inch). Characterized by its long snout, this species typically inhabits red sponges.

The Sponge Goby has a singular dorsal spine with eight dorsal soft rays, as well as one anal spine with eight anal soft rays. It also possesses 15 rays on its pectoral fins and an elongated body with a depth at the anus measuring 15% of its standard length. The head is slightly wider than it is deep, and the snout, which is notably long and flat, comprises 41% of the head length. The eyes take up 28% of the head length, and the lower jaw extends slightly forward.

The gill opening reaches forward to just below the center of the eye, and two pairs of curved canine teeth are present on each side of the lower jaw. Its tail fin is rounded, and the pelvic disc is broad and flat, not extending to the genital papilla. Each pelvic spine is flattened and joined to a frenum without a pocket underneath.

In its natural state, the Sponge Goby's body is translucent with a dusky yellow coloration over the abdomen. Its snout is primarily yellow, marked by a blackish stripe running from the eye to the front of the jaws, and there are scattered dark spots on the head behind the eyes.

This species has been found in the 🌊 Indian Ocean, specifically off the coast of 🇸🇩 Sudan, and may also be present in the Gulf of Aqaba. The name spongicolus reflects its commensal relationship with sponges, highlighting its unique ecological niche.