The tadpole and Gish show the following structural adaptations to life in water:
• Both a fish and a tadpole have a streamlined body shape without a neck that enables them to move easily through water.
• The tail and tail fin of a fish are special adaptive structures for swimming. The tadpole too has a fish like tail and tail fin which enable it to swim.
• Gills are gaseous exchange organs that are adapted for an aquatic environment. They are found in both the fish and the tadpole. In a very small tadpole, the grills are outside the body. These external grills are soon replaced by internal gills which are similar to those in fishes.
