Board Thread:Fan-made Monsters/@comment-38427691-20190223034136/@comment-38427691-20190225065629

In mythology Hera has the Lernaean Hydra as a pet, raised just to kill Heracles, when heracles with the help of his nephew went to slay it in one of Heracles 12 labors they were about to defeat it.

When Hera saw the Hydra in trouble, she sent a giant crab to it's aid.

When both beasts were defeated by Heracles and his nephew, the Hydra and the Giant Crab were placed by Hera as the constellations "Hydra" and "Cancer".