Then they are capable of short bursts of very fast speed. These fish have a broad base on their tail. Depressed fish and those that move with their dorsal and anal or pectoral fins are not extremely fast in terms of forward movement, but can dart and turn swiftly, and maneuver in tight spaces. As students determine the relative speeds of the fish tested, have them look for other adaptations that may offset an animal's deficiencies of speed. Conclusions Fish have different methods for moving through water.
Some methods are better than others.
Speed is not the only thing that is important in terms of survival. A fish that is not speedy has other useful adaptations. Using your classroom aquarium You can hold fish races in your own tank if it is a big one. Most likely the aquarium fish you have chosen will not be fast swimmers. Have the students analyze ways that your fish move and which fins they use.