Image 1 - the female angler fish. You can see by her teeth that she is a terrifying predator and can reach up to one meter in length. Image 2… is the male angler fish. (I can’t guarantee if this is the same species of angler fish, but the anatomical differences are similar in all species). His main purpose in life is to find a female and bite on to her, fusing his body to hers and feeding off the nutrients she passes to him through her body. A female can have over six males attaching to her in this way, giving her a constant sperm flow!