How do pond tadpoles differ from stream tadpoles?

Pond tadpoles and stream tadpoles exhibit distinct physical adaptations suited to their respective environments:

• Pond Tadpoles: These tadpoles typically possess large bodies and deep caudal (tail) fins, which allow them to swim easily in quiet, still water. Their mouths are relatively small, located at the end of the snout or on the underside, and contain weak denticles for feeding on free-floating or attached vegetation, such as algae.1
• Stream Tadpoles: In contrast, these tadpoles have depressed bodies, long muscular tails, and shallow caudal fins. Their mouths are relatively large and equipped with many rows of strong denticles. In highly modified species, the mouth functions as an oral sucker, enabling the tadpole to anchor itself to stones. This allows them to move slowly across surfaces while grazing on bacteria and algae.1