Why are starfish said to have pentaradail symmetry?

How do you do tell if a guppy fry fish is female or male? What do white pinchers eat? What do baby bluegills look like? Images of the different kinds of sea animals? If you fish in four ponds will more fish be caught in the two ponds with the lowest oxygen concentrations or the two ponds with highest oxygen concentrations? Why do women wear fishnet stockings? What is the difference between a sand shark and a dogfish? Does littering killing your fish? What is the clownfish respiration? What causes the sand in a above ground sand filter to turn hard like a rock? What is the biggest sharks to the smallest? Do angelfish grow? What organisms does the Manta Ray interact with? How much does a bass recorder cost? Your goldfish is not active and her spine is bent? What type of food do bass eat? What is euryhalin? What is the function of upper jaw of perch? What does sand crabs eats? What is the biggest difference between the body structure of the cave fish and minnow?