Jalpida
From Warhammer 40k - Lexicanum
Jalpida were serpents, several times larger than a adult human, that lived on the planet Olympia. Its flesh was said to be poisonous to normal men. [1]
It was the first of the local apex predators that the Primarch Perturabo hunted down and killed one of to protect the local population when he was growing up. [1]
