Heres how the monsters relate to each other.
Saber and Fig are the top predators. They rule over the other two; Fig with its cunning and Saber with brute force.
When shrimp is under threat from the predators it shivers in fear and uses its speed to escape. Otherwise it lives its life in constant fear; motivated only by the ball of food it eats and shits out.
Blob starts lighting up as a threat display to the predators. It is too lazy to move itself. It eats the lice that feed on Saber.