Ecco the Dolphin (1992)

Ecco the Dolphin is an action-adventure game originally developed by Ed Annunziata and Novotrade International for the Sega Genesis and published by Sega in 1992. Ecco the Dolphin was republished digitally via Nintendo's Virtual Console in 2006, Microsoft's Xbox Live Arcade, Steam, iOS, and Nintendo 3DS.
It is the first installment in the Ecco the Dolphin video game franchise. The player character is a bottlenose dolphin who travels through time to combat hostile extraterrestrials in Earth's oceans and on an alien spacecraft.