Condition: Acceptable: Signs of wear and consistent use. See images for the condition of this book.
Blurb: Ace Science Fiction Special 2
From the back cover:
If a water animal can change into a land animal, why should not a land animal sometimes change into a water animal? That was the goal of the research conducted at Cobb Seamount, an underwater experimental station. Then they received the mysterious "Red Tide" broadcast-something about widespread epidemics...military retaliation...-and suddenly there wasn't any surface to return to. Now life at Cobb Seamount was no experiment, it was survival.