
Much like many species of fish, he has pronounced lips and scales all over his body, as well as gills located on the sides of his head which is directly connected to his neck.
CREATURE FROM THE BLACK LAGOON MOVIE
Since the movie was filmed in black and white, most people aren't aware that the creature's true coloration is moss green, to better camouflage itself with the similarly colored waters of his lagoon.

Gill-man's true colors, as seen in one of the original suits. ~ Julie Adams on the creature's true colors, since most restorations are too bright and garish. Well the original Creature was this soft moss green, a very subtle color so it picked up shadows and it had the feeling of reality, of flesh. ~ The tagline for Creature from the Black Lagoon. Not since the beginning of time has the world beheld terror like this! Throughout all three movies, Ricou Browning portrayed the Gill-man underwater. On land, he was portrayed by the late Ben Chapman in the first movie, the late Tom Hennesy in the second and the late Don Megowan in the third. Gill-man has since become an iconic Universal monster, and although never reaching the status of Frankenstein's Monster, Count Dracula, Wolfman and others, it is still shown alongside his fellow monsters every time the line-up makes an appearance in media. He is the last of a race of amphibious humanoids that existed back in the Devonian age and resided in a lagoon deep in the Amazonian rainforest. The Gill-man (also better known as the Creature from the Black Lagoon, the Swamp Creature and the Amphibian Man) is the titular main antagonist of the 1954 classic horror film The Creature from the Black Lagoon and its two sequels from 1955 ( Revenge of the Creature) and 1956 ( The Creature Walks Among Us). ~ The opening narration for The Creature from the Black Lagoon. The record of life is written on the land, where fifteen million years later, in the upper reaches of the Amazon, man is still trying to read it.

In infinite variety, living things appear, and change, and reach the land, leaving a record of their coming, of their struggle to survive and of their eventual end. Now, in their warm depths, the miracle of life begins. The restless seas rise, find boundaries, are contained. The heat rises, meets the atmosphere, the clouds form and rain pours down upon the hardening surface for countless centuries. This is the planet Earth, newly born and cooling rapidly from a temperature of six thousand degrees to a few hundred in less than five billion years. In the beginning, God created the Heaven and the Earth.
