How does a fish
operate? · Buoyancy
Unique part of
the fish, the air bladder (buoyancy). Similar in function to the ballast
tanks in a submarine, varying the inflated volume of the sack the fish
can adjust its degree of buoyancy.
Very few fish can
handle sudden changes in pressure when hauled up too quickly from deep
water (cease to struggle in the fight, gas bladder distended and protrudes
through the mouth).
For fish that come
up from deep water with their air bladder in their throat, take along
a hypodermic type needle to insert in the bladder to relief the pressure
in the bladder before releasing.
Fish without air
bladder live a life of constant motion to prevent them from sinking
or adapt to bottom living.
does a fish operate? · Respiratory