Coelamon

Coelamon is an Ancient Fish Digimon that resembles the coelacanth, one of the most ancient species of fish. This Digimon was discovered on a computer network that was destroyed by a vicious hacker and then restored. Living in the Net Ocean, his body structure is primitive, although he has flippers that resemble hands and feet. It is thought that from this, primitive Digimon who live at the bottom of the sea eventually evolved into terrestrial forms, and increased in number and types.

In the English dub, his name was pronounced "Koe-El-a-Mon".

Digimon Adventure 02
Joe Kido and Cody Hida traveled to Australia where they met Derek, whose partner was Crabmon. Crabmon digivolved to Coelamon to help Ikkakumon and Submarimon fight a Scorpiomon and several other aquatic Digimon, which were all guarding a Control Spire. After the battle he easily destroyed the Control Spire.

Digimon World
A Coelamon bridged the gap between two sections of File Island, then joined the city and set up shop in File Town. Once the shop becomes more established, he moves to the Centaur Clinic to give advice about trainer points.

Digimon World 2
Coelamon digivolves from Crabmon and can further digivolve into MegaSeadramon.

Digimon World 3
Appears near most water.

Digimon World Dawn/Dusk
Coelamon digivolves from Syakomon and can digivolve to Scorpiomon. They also live in Macro Sea.

Attacks
 * Fossil Bite: Expels needle-like projectiles from his fins.
 * Ancient Bite: Jumps near opponents with water-like energy and then he slashes them with all his claws and fins.