We went to the National Aquarium a couple of weeks ago, so I thought this would be a nice follow-up craft for Tater and Monkey. It's very simple.
Tissue paper cut into small squares
Small paper plates
Put glue on the plates and let them place on the tissue. Cut out fins and head for the fish, and head, tail and legs for the turtle. You could even punch a whole through the top of a plate and hang them with string.