Are Fish Organisms? Explore Their Classification, Characteristics, and Ecological Importance
A fish is an aquatic vertebrate that breathes through gills. Fish usually have fins for swimming and do not have limbs with fingers or toes. They belong to the phylum Chordata and include about 34,000 species found in freshwater and saltwater. Most fish are cold-blooded and play important roles in ecosystems. The characteristics of fish … Read more