Disturbing at so many levels

While reading a kid's nature book called "Creatures that Glow" I came across this passage regarding the Angler fish (which you may recall as the deep-sea fish with a flashlight from Finding Nemo):

During mating, the tiny male attaches himself by his teeth to the female. His body then fuses into hers--all that is left of the male is a small pouch on the female's side. The pouch contains the male's reproductive organs, which will fertilize the female's eggs.

Here's wikipedia's take on it:

When scientists first started capturing ceratioid anglerfish, they noticed that all of the specimens were females. These individuals were a few inches in size and almost all of them had what appeared to be parasites attached to them. It turned out that these "parasites" were the remains of male ceratioids [...]

When it is mature, the male's digestive system degenerates, making him incapable of feeding independently, which necessitates his quickly finding a female anglerfish to prevent his death [...]

When he finds a female, he bites into her skin, and releases an enzyme that digests the skin of his mouth and her body, fusing the pair down to the blood-vessel level. The male then atrophies into nothing more than a pair of gonads [...]

This extreme sexual dimorphism ensures that, when the female is ready to spawn, she has a mate immediately available.

Weird.