Very special thanks for the first photo of
Chaenopsis schmitti to Dr. Gerry R. Allen, he has taken the photo at GalapagosIslands.
Chaenopsis schmitti is a reef-associated species that inhabits worm tubes on sand and rubble substrate to depths of 30 meters.
Males blennies are territorial and vigorously defend their worm tube homes.
When courting, the male will assume the S-shape position and dart quickly back and forth from their place of shelter.
When threatened, the Yellow-mouth pikeblenny opens its enormous mouth, which significantly increases its apparent size to the invader.