Unidentiidae
Unidentiidae is a family of marine fish in the order Perciformes. They are commonly known as unidentiids or rockfish, and are found in the Indo-Pacific region. Unidentiids are distinguished by their elongated, slender bodies, large eyes, and relatively small mouths.
Characteristics
Unidentiids are typically small fish, with most species reaching a maximum length of less than 10 centimeters. They have a distinctive body shape, being long and thin with a compressed head and a tapering tail. Their eyes are large and prominent, and their mouths are small and terminal. Most species have a single dorsal fin with a long, continuous base, and a single anal fin.
The coloration of unidentiids is highly variable, but they are often characterized by bright colors and bold patterns. Many species have a mixture of red, orange, yellow, and black markings, which help them blend in with their surroundings. Some unidentiids are bioluminescent, emitting light from specialized organs.
Environment
Unidentiids are found in a variety of marine environments, including coral reefs, rocky shores, and seagrass meadows. They are typically found in shallow waters, but some species can occur at depths of up to 100 meters. Unidentiids are often associated with specific habitats and are known to exhibit site fidelity, returning to the same locations over time.