Dynamic lift
From Biocrawler, the free encyclopedia.
Denser fish use their pectoral fins to create dynamic lift, similar to aeroplanes and birds. As these fish swim, their pectoral fins are positioned in such a way as to create a difference in pressure which allows the fish to maintain a certain depth. The two major drawbacks of this method are that these fish must stay moving to stay afloat and that they are incapable of swimming backwards or hovering.
