
But since were on fish subject.
I'm thinking of getting a mantis shrimp, the are very cool looking and extremely unusual. They have hyperspectral imaging eye sight so they see normal like human but can also see ultraviolet & infrared like Predator in predator movies. http://en.wikipedia.org/wiki/Hyperspectral
The salt water aquarium store near me always has a few caught out of other peoples big aquariums and will give them away to anyone free usually because they are a scourge in big tanks.
They sneak accidently into peoples salt water aquariums hiding in live rock.
They are unwanted in any normal aquarium as they destroy everything, kill fish and coral, eat everything and the smasher species can smash through normal aquarium glass. But, if you have very strong glass aquarium and keep them by themselves, they can be cool pet. There is also a spearer type that cannot break glass.
This what they look like anyway.

