Origin of tail fan
Examples from the Web for tail fan
Historical Examples of tail fan
The uropods are generally very small, and do not form a tail-fan.
The uropods no longer form a tail-fan, but are adapted for firmly wedging the hind part of the body into the coils of the shell.
T, telson, having the uropods or appendages of the last abdominal somite spread out on either side of it, forming the “tail-fan.”