Cephaglobinid family tree
Here is a more interesting one; a family of the cephaglobinids in A Door into Ocean. My students will do this one on Friday.
Cephaglobinids are the squids on steroids, such as the “rocket squids” that fly out of the water, and the seaswallowers that migrate from pole to pole, devouring entire floating rafts. Then there are the smaller fleshborers, like a cross between maggots and piranas.
There are actual squids that fly out of the ocean.
P. S. The answer for the tree is here.