Is it ever explained in any lovecraft story why the deep ones

>>8393101
The Deep Ones are the worshippers of Dagon and Cthulhu, they sacrifica people for unknown reasons but it's hinted that it's a part of a ritual that needs killings in order to satisfy their Gods.
They breed with humans because their gene is stronger than ours and by the time we reach full madurity the Deep One gene kicks in and you are drawn to the sea to join your fish brothers and make the cult greater.
They don't want to kill the humans and replace them on earth, they are waiting, worshipping Dagon and expecting Cthulhu to take back Earth when he awakes.

You are very missinformed, what stories have you read?

>>8393142
i read a shadow over innsmouth a while ago and the dunwich horror more recently. was planning on getting into some more lovecraft, but i wanted some clarifications.

Not necessarily misinformed, just missing information.

>>8393154
At the end of SoI it's explained that /spoiler/ the protagonist has Deep Ones blood and he goes to break his cousing from jail and travel with him to Innsmouth to meet with their Deep Ones relatives. Read At the mountains of madness, everythins is pretty much explained there.