How can you decide if in an unknown animal is fish or anphibian?

Answer 1

To determine if an unknown animal is a fish or an amphibian, observe its skin and respiratory features. Fish typically have scales and breathe through gills, while amphibians have smooth, moist skin and can breathe through both gills (in their larval stage) and lungs (as adults). Additionally, consider the animal's habitat: fish are primarily aquatic, whereas amphibians often require both aquatic and terrestrial environments for different life stages. Lastly, check for the presence of limbs; amphibians usually have limbs, while most fish have fins.