Snakeblenny

The Xiphasia setifer, commonly known as the hairtail blenny or snake blenny, is a fascinating species of combtooth blenny found in the western Pacific and 🌊 Indian Oceans. Renowned for its extraordinary length, this species can grow up to 53 centimeters (21 inches), making it the longest among combtooth blennies. Its body is exceptionally elongated, which makes it easy to distinguish from other blenny species. The dorsal fin begins just above its eye and includes 13-14 spines and 105-119 soft rays, while its anal fin has 2 spines and 107-119 soft rays.

The hairtail blenny inhabits tropical benthopelagic zones at depths ranging from 2 to 190 meters (6.6 to 623 feet), typically residing on open soft-bottom and muddy habitats from shallow bays to deeper waters. These blennies are nocturnal and are rarely seen during the day, with their activity usually increased at night. Their diet consists mainly of crustaceans, including copepods, polychaete remains, foraminifera, fish scales, and a bit of sand and mud, as evidenced by the stomach contents of specimens captured off the coast of western 🇮🇳 India.

These blennies are oviparous, meaning they lay eggs. Their distinct breeding behavior involves pairing during reproduction. Their eggs are demersal and stick to substrates with the help of an adhesive pad. The planktonic larvae are often found in shallow coastal waters, remaining close to the habitats where they eventually settle.

Geographically, the hairtail blenny can be found in the Indo-West Pacific region, stretching from the 🌊 Red Sea and False Bay in 🇿🇦 South Africa to 🇻🇺 Vanuatu, and from southern 🇯🇵 Japan down to 🇦🇺 Australia. Despite their eel-like appearance, they are surprisingly not known for swimming far from their burrow. This unique fish is also sometimes available in the aquarium trade, though it is not commonly encountered. The genus name Xiphasia is derived from the Greek word "xiphos," meaning sword, which elegantly describes the blenny's elongated form.