Looks like you are using an old version of Internet Explorer - Please update your browser
The firefish’s elongated dorsal fin is used to communicate with other firefish.
The firefish’s elongated dorsal fin is used to communicate with other firefish. It is also used to lodge itself into small cracks and crevices of a reef. This defense mechanism became part of the firefish’s instincts only after the Fall since before the Fall all animals were vegetarian.
CLASS: Actinopterygii (ray-finned fishes)
ORDER: Perciformes (perch-like fishes)
FAMILY: Microdesmidae (dartfishes and wormfishes)
GENUS/SPECIES: Nemateleotris decora
Size: Up to 3 in (7.6 cm)
Depth: 20–200 ft (6–60 m)
Diet: Zooplankton and small crustaceans
Habitat: Indo-Pacific region