I was thinking are any small fully aquatic turtle's that I could put in my fish tank? its 265 gallons not quite big enough for a FRT. I know about musk turtles and stuff but i was looking for something a little more active.
First of all: There is no fully aquatic turtle. Every turtle species needs to have a dry area to lay eggs or to dry off at least once in a while.
Second: Musk turtles will do well in a 265g tank if they are accustomed to the depth and if you provide rocks, logs or something elso to climb to the surface. I have seen stinkpots in Florida springs in 3m depth, no problem for them.
Third: Maybe you want to google for pink belly sidenecks (Emydura subglobosa). They are good swimmers, have a friendly character and look stunning. But don't forget on the land/egg laying area!
I keep my mata mata fully aquatic in a 135 gal. here is a link to that thread if you want to see peoples different views on keeping these turtles completely aquatic:
Hmmm this is not looking so good. First off there will be no land area Period Its mainly a fish tank... and woudlent be centered on a turtle. I might have to look into this more. thanks guys!
i dont see any turtle species that would work with your tank and situation. unless you dont care about the fish then a smooth softshell or asian softshell would be more than perfect.