Read this article about how the ph changes in the ocean is favoring an increase of Jellyfish communes in the ocean. We actively can help by choosing sustainable fishes like albacore instead of tuna. And by keeping up with the world around us.
Megaleledone setebos, a shallow-water circum-Antarctic species from the Southern Ocean. It is the closest living relative to deep-sea octopuses. The specimen shown is a juvenile; adults reach a total length of nearly 1m.
Cnidaria - coral and jellyfish - radial symmetry - aquatic habitat - no coelom - incomplete digestive system - no circulatory system (diffusion) - simple nervous system - simple muscular system - complex reproductive system - hydrostatic skeleton - simple respiratory system - special stinging cells (nematocysts)