Brotulophis argentistriatus Kaup, 1858[1] Pholidichthys leucotaenia, commonly known as the convict blenny/goby or the engineer blenny/goby, is a marine fish from the west-central Pacific Ocean.

[2] DNA analyses show this species to be neither a blenny nor a goby, but part of a separate fish family, the Pholidichthyidae.

[3] In the Solomon Islands, researchers under Eugenie Clark found juveniles emerging from holes in the seafloor and adjoining coral reefs.

At the end of the day, all returned to the burrows, remarkable and unique behaviour for larval fish.

Over the course of the first year in captivity, the engineer goby fry will gradually change color as it grows up to 1 cm per month.