A Fish tank with some plesiosaur and tunas.
They look for neighbours of the same species and follow them.
In a few interactions they scholl behavior is clearly visible.
Here, the camera is following a plesiosaur.
I have created crawling creatures (named Yodan) that moves at the bottom; they are affected by gravity.
They also presented schooling behavior.
A single Yodan creature can't climb the stone at the bottom of the tank, but when a group is formed it is posible to a creature to climb it.