I tried to make another print of the Valentines Dolphin I found on Thingiverse. I think it's just a bad model design for PLA filament but might work better with a different filament. The stem is too thin around the base. Each time I take off the support structures the dolphin is halfway broken off the base. Maybe it just needs to be scaled up so the body is thicker? Might try it again another day.
Image Source: Personal Photo