Dolphin

Dolphin is an action arcade game for the Atari 2600, developed and published by Activision in 1983. You guide an endangered dolphin by listening to sonic tones and catching waves while navigating openings in schools of seahorses.

A monstrous squid pursues the dolphin. Leap to touch an approaching seagull, then turn and chase the squid for points, or reverse direction and swim beneath the squid while it is committed to a wave. Points are awarded for touching seagulls or the squid, catching good waves, sending the squid into bad waves, and passing accurately through the seahorse openings.