always new thing being found bud a lot has 2 do with ppl releasing pets ect n there breading n making new hybrids ect but some stuff is just unreal u should see some off the things we get asked about even just in the river clyde here and a lot off it is a first for every 1 that sees it , and how far the sea is coming up the rivers ect n fish r adapting 2 the new conditions its insane did u check out the sneakhead?? as far as I remember its a very aggressive salamander sort off thing but if u wanna sea a lamprey have a google of them also lol enjoy