Let's go to one of the repositories for Blender, which can be found at http://www.opengameart.org/, and let's try to search for what is closest to our character.
seain the Search box, and choose 3D Art for Art Type, as shown in the following screenshot:
We have some interesting options. We see a shark, seaweed, and some icebergs to select from.
file.blenddownloadable. Click on it ...