 There are plenty of fish in the sea. Well, that kindly friend or relative is wrong, dead wrong. And not because you're hideous and undesirable, but because the fact is, many fish are declining in number. Now, here's the part where you might ask, what can I do? Well, I'll tell you. On your next date, if you're going out for a nice meal or cooking a romantic dinner at home, be sure to choose fish that are plentiful or caught in an environmentally friendly way.