This is probably the reason why many species use their fins or arms for moving if possible.

While on the ocean floor, they do not use their paired fins for any kind of movement.

These fish use their fins to move around in skips.

It came up on to the land using its fins as crutches.

They use their pectoral fins to walk about on the sea floor.

They could also use their strong fins to hoist themselves out of the water and onto dry land if necessary.

They can crawl on dry land, using their paired fins.

Should there be a need to relocate, the fish can move out of the water using its extended fins.

Replies: The standard theory is that they used their fins to move in the mud near the water.

It can also catch food by using its "fins".