ID Blennies & Gobies

Blenny or Goby?

Blennies (bottom two) have only a single, long dorsal fin while Gobies (top) will have 2 dorsal fins. Some Blennies have simple or unually shapped ciri on their head, while all Gobies do not. Finally, Gobies will typically make a head first dive to escape, while Blennies will typically back into the corals or crevices.