Fish have a tail and spine, in conjunction with gills for respiration and scales masking their bodies. It is actually believed that they started to evolve approximately 480 million several years in the past. Fish are enjoyment to keep as pets, but cleaning the tank is never an interesting undertaking. https://uaedogsupplies05813.thelateblog.com/37207526/the-ultimate-guide-to-pet-aquarium-supplies