no, most have 7-9 tentacles
no
no they have many sizes depending on what kind it is
The nematocysts are stinging cells of cnidarians located all along the feeding tentacles. These cells are inverted "harpoons" that react physically and chemically to stimuli at a speed of 1/1000th of a sec.
Hydra, Crater, Corvus
no not all
The tentacles have suction cups at the end of them and they are longer, but the arms are shorter and have suction cups all over them. There are 2 tentacles and 8 arms on the squid.
Hydra - the polyp, anchored with a stalk, tentacles up; and medusa, the jellyfish, swimming free, tentacles down. All cnidarians have both stages, like larva and adult, but they spend more time in one of them and are known as that stage, for example anemones and jellyfish. Anemones have a tiny jellyfish dispersal stage, and jellyfish have a tiny polyp reproduction stage.
So if you do something to hurt it can easley choke you
you have to jump on all 5 of the hydra's heads and then click on the hydra and you will get the scale
The anus of an octopus is behind its brain.
Jellyfish do not have wings they have tentacles to help them swim under water!EXTRA INFORMATION:if you have ever seen a jellyfish swim, you would have noticed that all of their tentacles move swiftly at the very same time.
they all have suction cups. There are eight tentacles and two arms(they all have suction cups). Hope this helps!