Ichthyosaurs were aquatic dinosaurs. Fossils show us that they had dorsal fins and tails, as do fish, even though their closest relatives were terrestrial reptiles that had neither dorsal fins nor aquatic tails. The dorsal fins and tails of ichthyosaurs and fish are...
Ichthyosaurs were aquatic dinosaurs. Fossils show us that they had dorsal fin and tails, as do fish, even through their closest relatives were terrestrial reptiles that had neither dorsal fins nor aquatic tails.
