wiggler

It must be floated on the water at first, or until it reaches the point of development into a wiggler.

One Wiggler would not dive until he was sure a certain Robin had seen his new suit.

At the tail-end of his body each Wiggler now had two leaf-like things with which he swam through the water.

One little Wiggler crossed his feelers at him, and they say that it is just as bad to do that as to make faces.

It is now some thirty years since I discovered "Professor Wiggler," and noted his peculiar eccentricities.