The Hippocampus is a glamourous animal of the ocean. They were the pets of the sea and horse god, Poseidon and would draw his chariot across the sea. They have the upper-half of a horse and the lower-half of a fish or dolphin. They love being out at sea and are fairly strong creatures with lots of stamina. They are devotional to their god and like to spend time with their fellow Hippocampi.
Hamadriad are supernatural creatures that live in trees in Greek mythology. They are a special class of nymphs. Hamadriad born in specific trees and has a very close relationship with the tree which became her residence. If the trees are inhabited dead, then she will die, too. Therefore, Driad and the gods will punish anyone who harm trees. HAMADRÍADE en español!
The Hydra, an ancient serpent-like chthonic water beast that possessed many heads , the poets mention more heads than the vase-painters could paint, and for each head cut off it grew two more, it's poisonous breath and blood were so potent, even its tracks were deadly. The Hydra of Lerna was killed by Hercules as the second of his Twelve Tasks