the stoat and an otter...

...this could be the adventures of the stoat and the otter, could even be the revenge of the stoat and the otter. Thinking about it, the stoat and otter could reproduce and have a stotter or an oat.

intelligent freshwater fish

Here's a load of fish which I drew and cut out and titled 'intelligent freshwater fish' because they all had an air of intelligence about them.