Symmetrical octopus seal.
WARNING: the model could definitely use some clean up. The pictured print was arrived at by a friend with a good handle on his printer. Your mileage may vary.
I've added some low-poly-count versions of the model, in case that helps!
UPDATE I recently bought a printer myself and tried printing this thing. Holy mother of support material! I have uploaded a new version with a significantly flattened bottom that should make printing a tiny bit easier.
look for: octo-object-double_sided-low-poly2.stl
Sculpted in Sculptris