Viruses or off-shore oil drilling may be the culprits for the latest die-off of sea creatures, including porpoises, sea lions, pelicans, and other species.

Besieged by mobile carnivorous sea urchins, the formerly sedentary crinoids have also become mobile, over millions of years. It is move, or be eaten.

There are snakeheads coming to your town. Beware!

It thinks with a clear head, and then snatches food from its competitors.

'Poor man's lobster'?