They live in sea. They are invertebrates. Invertebrates are animals with no backbone. They also have stinging cells.
Pacific Sea Nettles Hydra Portuguese Man'O War common jellyfish
they both can kill
Anemone's, hydra, and jellyfish.
Includes hydra, jellyfish and corals
Includes hydra, jellyfish and corals
Cnidaria (jellyfish, anemore hydra).
hydra
The hydra is classified under the phylum Cnidaria, which includes other organisms such as jellyfish and sea anemones.
medusa
Jellyfish, hydra, corals & sea anemones.
Some common breeds of jellyfish found in the ocean include the moon jellyfish, lion's mane jellyfish, box jellyfish, and the Portuguese man o' war. Each breed has unique characteristics and can be found in different regions of the world.
Closely related: obelia jellyfish Not closely related (but still related): coral sea anemone