Ecco The Dolphin Wiki

Vortex Snake in Lunar Bay

Vortex Snakes are relatively harmless enemies which will only hurt you if you bump into them. They are long, brown, and composed of segments, like a train's cars. All can be killed with a dual charge attack. A large stinger grows from the rear of their bodies, most likely a defensive appendage or perhaps used to burrow into the ocean floor. Appearing prominently in the Lunar Bay and Dark Sea levels, they were perhaps originally a species directly from Planet Vortex and then imported to Earth.

When they die, they disappear in a puff of foam, with a hissing sound.

In The New Machine, a variant of this species will actively pursue Ecco through the room near the end of the level.