🐚Jellyfish🐚
What are they made of?
- Jellyfish are about 95 percent water.
- Lacking brains, blood, or even hearts, jellyfish are pretty simple critters. They are composed of three layers: an outer layer, called the epidermis; a middle layer made of a thick, elastic, jelly-like substance called mesoglea; and an inner layer, called the gastrodermis.
- An elementary nervous system, or nerve net, allows jellyfish to smell, detect light, and respond to other stimuli.
- They aren’t particularly dangerous; however, their sting can be painful and causes discomfort for their unfortunate victim. They are usually difficult to spot in the water and bathers get stung by coming into contact with the jellyfish’s tentacles.