👉 Pachytylus is a genus of about 12 species of small to medium-sized aquatic animals, primarily found in freshwater and brackish-water habitats. The species are characterized by their long, slender bodies that are often white or gray in color, with distinctive black spots on the back and sides. They have a wide range of sizes from very small to large, ranging from 0.5 to 1 meter (2-3 feet) in length. Pachytylus