Well, you’ve uncovered the root problem, tasty no-legged critters and their lot in life.
Personally I’m quite fond of herring; smoked or brined served up with sour cream and onions. Not so fond of krill or plankton.
Ergo I have no personal dilemma. Besides, herring aren’t as awesome as whales, nor as cute as kittens and puppies. They don’t stand a chance.
In closing I serve up “Les Poissons” from Disney’s “The Little Mermaid”
http://disney.wikia.com/wiki/Les_Poissons
Not a fan of herring but I like Plankton.
One day he’ll get the Krabby Patty Formula.