The player controls Nautila, a "babelfish" which is used to indirectly influence the environment within a huge water tank. Nautila has to suck up dangerous fish, clear rocks, supply food etc. for brine shrimps resembling the Sea Monkeys brand. The Sea Monkeys try to reach a Venus Shell as soon as they are hatched. If Nautila is not fast enough to clear the puzzles preventing the Sea Monkeys from reaching their shell, they will perish... The game features 70 levels in total, with increasingly difficult objectives.