Compass Jellyfish (Chrysaora Hysoscella)
Compass jellyfishes are found primarily in the Southern and Western hemispheres. It inhabits inshore water. It has a diameter of about thirty centimeters and has twenty-four tentacles! The compass jellyfish is believed to have evolved from triploblastic organisms.
The compass jellyfish have two layers of "skin"- the epidermis (outer layer) and the endodermis (inner layer). The epidermis is always exposed to the sea water. The cells of the epidermis exchange gas directly. However, the endodermis must obtain sea water through the gastrovascular cavity. This is a pathway that goes from the mouth of the jellyfish to all the other parts of the organism. This pathway extends all the way to the tentacles of the jellyfish. The circulation can also function in the compass jellyfish due to the contraction of the tentacles. However, this circulation is not very effective because the compass jellyfish uses the same pathway to excrete waste.
The compass jellyfish have two layers of "skin"- the epidermis (outer layer) and the endodermis (inner layer). The epidermis is always exposed to the sea water. The cells of the epidermis exchange gas directly. However, the endodermis must obtain sea water through the gastrovascular cavity. This is a pathway that goes from the mouth of the jellyfish to all the other parts of the organism. This pathway extends all the way to the tentacles of the jellyfish. The circulation can also function in the compass jellyfish due to the contraction of the tentacles. However, this circulation is not very effective because the compass jellyfish uses the same pathway to excrete waste.