@umbra21 - I don't know about fish but we share some reflexes with frogs. Like the scratch reflex. There have been a lot of studies done on frogs to investigate that one (which is just as it sounds, irritating the skin makes you want to scratch it).
I think that one is a spinal reflex too.
There's another interesting one, the diving reflex which can be found in mammals and birds. It makes you hold your breath when cold water splashes your face. I guess that one helps you not to drown if you fall in a river or something.