The elf fish is generally 10-35 yuan. The elf fish is 4-6 cm in length. It is also known as the ear-spotted catfish. The catfish such as the elf fish will eat aquatic plants, but the elf fish will not . Due to their small size, elf fish can swim into very narrow spaces, so some people keep them as scavengers in aquariums.

The elf fish is cheap, durable and easy to maintain, although the cleaning ability is far less than that of a helicopter It is similar to the full rain snail (lilu snail), but it is worse than diligence. The body length is about 3CM. Basically, 60 cylinders can be equipped with 2-3 only, and the large cylinders can be increased proportionally. It should be noted that the elf likes weak acid water, and it needs a short water transfer process when buying it back. Adapt to the environment quickly.