At least in the beginning, the blob is based on the blobfish, which lives deep underwater near Australia and New Zealand.

Once dubbed the "world's ugliest animal," the blobfish – scientific name Psychrolutes marcidus – has been named New Zealand's ...

the blob is based on the blobfish, which lives deep underwater near Australia and New Zealand and has frequently been called the world’s “ugliest fish,” although that’s largely based on ...