The eye spots in front of the body see movement. Millions of years have passed. The animal is well adapted to its home among the rocks. It is protected by a shell over its body, and has long, flexible tentacles to help with locomotion and the capture of food. It eats plants and animals.
Reproduction is mixed, both asexual and sexual.
There are many of these animals around in the warm shallow seas, but they move slowly, and so may not find each other. Begin with Primitive Ancestral Animal. The Animal is Getting Longer. Millions of years have passed. The animal is getting longer and thinner.