The sea hare likes to live in the environment of clear sea water, open current and seaweed, and feeds on various kinds of seaweed. It has a very special

avoidance skills,

is to eat what color seaweed will become what color. For example, a sea hare that eats red algae has a rose-red body, and a sea hare that eats cuttlefish has a brownish-green body. Some sea hares also have fluffy and dendritic protrusions on their body surface, which makes the hare's body shape, body color and pattern very similar to the seaweed in its habitat, thus avoiding a lot of trouble and danger for itself.

The sea hare is capable of both passive avoidance and active defense. In the sea hare body there are two kinds of glands, one is called purple gland, born in the edge of the outer coat membrane

underneath, when the enemy, can release a lot of purple-red liquid, the surrounding seawater will be dyed purple, in order to escape from the enemy's line of sight. There is also a poisonous gland in the anterior part of the coat membrane, can secrete a kind of slightly acidic milky liquid, the smell is unpleasant, the other side if contact with this liquid will be poisoned and injured, or even die, so the enemy smells this kind of odor, far away from avoiding, is the chemical weapon of the imperial enemy. [3]

When a creature is attacked by a predator, the method of deflecting the attack can be to induce the predator to attack those parts that can be sacrificed and irritating. For example, a sea slug bears bright red papillae that swing around if it is harassed, and fish bite them; the papillae can regenerate after they are bitten off, but because the papillae contain stinging cells and glandular secretions, the predator will discard them and will not attack it again