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The main function of the dorsal fin in any animal with a dorsal fin is stability. Some fish have adapted for using the dorsal fin for other uses, such as propulsion in the Sunfish. The anglerfish's dorsal fin has evolved to work as a fishing pole so that the fish can bait and catch their prey.

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9y ago
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11y ago
For most fish, the dorsal fin keeps them from rolling over in the water (stability), and to help them make sudden turns.
For other fish, such as a sunfish, they use their dorsal fin (and anal fin) for propulsion.
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15y ago

the function of the anterior dorsal fin on a perch fish is to fluctute blood currents

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9y ago

The posterior dorsal fin helps to stabilize the perch and aids in sharp turns. It is located on the top of the fish.

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12y ago

i am really not sure . But I think the answer is...

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10y ago

The main purpose of a dorsal fin is to stabilize the animal and to help in movements and turns. Some animals have modified the dorsal fin to other purposes such as propulsion.

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6y ago

It is used for stability while swimming.

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14y ago

a really long word

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11y ago

To swim

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Q: What is the function of the Posterior Dorsal of a fish?
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