What Are Jellyfish Made Of?


Quick Answer

Jellyfish are made of 95 percent water and 5 percent solid matter. The solid matter is composed of three layers: the epidermis is the outer layer, the mesoglea or the jelly is the middle layer and the gastrodermis is the inner layer.

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What Are Jellyfish Made Of?
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Full Answer

Jellyfish are simple invertebrates. They do not have blood, hearts or brains. A jellyfish has a simple digestive system with one cavity for the intestine and stomach and one opening for the anus and mouth. The jellyfish's nervous system is a network of nerves that allow the jellyfish to detect light, smell and respond to stimuli. They have a radial symmetry; their body parts radiate from the center. This allows jellyfish to detect food and respond to danger from all directions. Jellyfish do not have a respiratory system. Their skin is thin and is oxygenated by diffusion. They have tentacles that can sting predators.

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