Freshwater loaches are a diverse group of fish that are popular in the aquarium hobby due to their interesting behaviors and attractive appearances. They are typically bottom-dwellers and are known for their ability to eat a variety of foods, including algae, small invertebrates, and even leftover fish food. Some species are nocturnal and spend much of their time hiding, while others are active during the day and can be quite social. Some popular freshwater loach species include clown loaches, yoyo loaches, and kuhli loaches. They are generally peaceful and can be kept with a variety of other fish species.