spotted nerite snail neritina natalensis eating algae from the fish tank glass

algae animal apple aqua aquarium aquatic beautiful beauty black bubbles cold color colorful crawling eating exotic fish fresh freshwater glass helmet horns house isolated macro marine motion mouth natalensis nature nerite neritidae neritina pet plant plants pulligera shell slime snail snails spiny spotted striped tank tetra tropical turrita underwater water wild wildlife yellow zebra