It doesn't need fins to move forwards, but fins are used to control rolling from side to side
Stabilising fins prevent a side to side rolling motion.
The fins help steer the submarine; making it be able to turn left or right.
Fins are used by squids to move at low speeds. Their siphon is used when they need to move quickly.
fairwater planes
They just move with waves and float so they don't need huge fins.
Yes. Wobbegongs are sharks, and need to be able to move freely in the water, so they do have fins. They have short caudal fins and much broader pectoral and pelvic fins.
what does the term stabilizing fin mean
Fins
They are actually called "planes" on a submarine and allow it to maneuver underwater. Horizontal "planes" allow the submarine to go up/down, vertical "planes" allow the submarine to go left/right.
they move there fins and muscles to move in the water!
ventral fins.
A submarine can submerge by filling ballast and trimmer tanks with sea water. The additional weight will take the submarine down. To resurface, the submarine will blow the sea water out of the tanks using compressed air. The air in the tanks make the submarine buoyant, so it rises and floats on the surface. Though a stationary submarine can submerge in this way, it usually submerges going forward and using diving plane (fins) to steepen the dive, so getting under the surface faster.