David Bremner reviewed A Darkling Sea by James L. Cambias
On the planet Ilmatar, under a roof of ice a kilometer thick, a team of …
decent technological extrapolation, adventure story
4 stars
I found the characters and ethical dimensions of the story not too deep (pun not intended, but I'm keeping it), but it does do a nice job of imagining what a civilization that evolved deep underwater might be like.