Edit 30/12/25: added 2 new sharks, the Hammer Head Shark and the Saw Shark:

This design was inspired by a classic shark, from a brand I cant say the name here. I made some changes that allow the shape to print without supports, and I added a biting mechanism to it:

it's a fun little toy and the biting action is pretty satisfying!

Here is how to assemble! But if you enjoy this please consider boosting me, its free!

if you want to sell this design, please take a membership!

Allright lets get started

print all the parts (only 3, upper body is print in place where mouth is allready connected to body). 

Insert the fin into the upper body:

now take a small rubber band (I use one from the makerlab beginner kit, link below) and wrap one end around the insertion in the mouth. The other end goes in a little cutout in the fin part:

the rubber band should stay above the tabs in the middle of the fin:

Now align the tabs on the lower body part with the holes in the upper body:

click everything together, but try to keep upper and lower body part parallel. Be careful, the tabs could break when pushed sideways.

correctly assembled:

enjoy!