Coryphopterus personatus

Coryphopterus personatus, commonly referred to as the masked goby, is a marine species of goby found in the western-central Atlantic Ocean.

C. personatus is a cryptobenthic species, living in caves and shaded areas near the sea floor in reef communities. Masked gobies are sequential hermaphrodites and are capable of changing sexes.

Description
This species reaches a maximum length of 4.0 cm. This species is difficult to differentiate from the closely-related ''C. hyalinus. C. personatus'' has a dark "mask" on its face, a faint dusky stripe on the lower rear margin of the body, and a translucent patch on the center of the top of its head. C. personatus is also slightly larger than C. hyalinus, which only reaches 3 cm (1.2 in).