It helps protect them against, erm... bumping into stuff? I guess?
They live in the deep sea! Not too deep, though, and they still like it warm. Rather than live in truly abyssal depths they prefer to hang out on continental slopes in tropical regions around the world.
Ateleopus means 'imperfect foot', a name which refers to their pelvic fins. In most adult Jellynose Fish the pelvic fins disappear almost entirely. They each become a single, long ray that dangles from their neck like an undone tie.
Video: Diego Asencio
One genus called Guentherus is a little different in that they retain their pelvic fins. It's just that the actual 'fin' part is really small and several rays are extra long so that they dangle from their neck like three or four undone ties. These rays are presumably sensitive enough to help the Jellynose find tasty crustaceans and stuff hiding on the sea floor. After all, it can't be easy to sniff anything out with your nose packed full of gelatin.
Speaking of which, what's up with that jelly-nose?
|Image: NOAA Okeanos Explorer Program|
And why the concentration in the schnozzle region? I guess they're simply THAT front-heavy!