Sci-Fi Dolphins from the eighties.
The first is from the Journal of the Traveller's Aid Society #6, 1980. I love the fact that the suit is double-hulled, with a small bubble that provides air. He doesn't have recognizable waldos (manipulator arms) although they're mentioned in the text.
The second is from Dragon #95, 1985, for the Ring World RPG. His suit is depicted with waldos.
Interestingly, the second one is a bit of a throwback--probably because of the older source material--in that the dolphins are unaltered. Humans just finally worked out how to communicate with them.
The former is one of the first examples of "Uplifted" dolphins (although it doesn't use that term) that have been enhanced in some ways by Humans or Ancients. 1980 seems to be the year we gave up on dolphins being our intellectual peers.
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