because some fish aren't adapted to well.
ones that don't don't need on
Increases the fish's volume by filling the swim bladder with oxygen.
Nobody knows the exact number of known species of deep sea fishes. There are too many species that cannot all be listed. The most deep sea fishes are yet unknown.
Correct
Men face Urge urine incontinence very often in which the bladder tries to empty despite best efforts to restrain leaking. There is a lack of co-ordination between impulses the brain gives to the bladder and what the bladder does. It leads to huge losses of urine and increase in frequency of urination.
Fishes of corse any kind of fishes !
Gills
Salmon and Tuna are most known fishes for yielding the fish oil.
Their is an air chamber in most fishes just like in submarines. When it gets filled with air the fish moves up. While, when air is released the fish moves down. This is precisely what happens in a submarine.
Of or belonging to the Teleostei or Teleostomi, a large group of fishes with bony skeletons, including most common fishes. The teleosts are distinct from the cartilaginous fishes such as sharks, rays, and skates
Like most fish, angler fishes lay eggs. They give birth in deep ocean water, where it is very dark. The male latches onto the female and stays that way.
Swimming
Bony Fishes