Wot the heck's wrong with fish eyes? Don't forget, you can also suck the marrow out of the fish bones... ah heck, I've done it with chicken too.
I've eaten frog. Taste just like real skinny chicken.
I've eaten a fish that was still.... breathing as it came to the table. Yes, the guy wrapped the head then dunked the entire fish in hot oil. I know, I know... very cruel but I was young and didn't know any better.
What else? Fish roe is my favorite though most would not consider it exotic.