Homologous vs. Analogous Structures in Aquatic Animals
No, dolphin fins and fish tails are not homologous structures.
Why They Differ
- Homologous structures share a common ancestor and similar underlying anatomy, such as a human arm, bat wing, and whale flipper.
- Dolphin fins evolved from the forelimbs of terrestrial ancestors.
- Fish tails evolved from the tail fins of aquatic ancestors.
Analogous Structures
Because both structures serve the same function (swimming) but have different evolutionary origins, they are considered analogous, not homologous.