1. Seagull: known as "Harbor Cleaner".
In addition to fish, shrimp, crab and shellfish, seagulls also like to pick up leftovers discarded by people on ships in ports, docks, bays and around ships. Therefore, seagulls are also known as "harbor cleaners". Seagulls are good at catching locusts, nocturnal moths, beetles, walkers and mice, so that the forest is free from pests and grows healthily.
2. Sharks.
Only by swallowing those infected fish can they ensure the "health" of the sea and the vitality of the sea. They are real ocean scavengers.
3. Ants.
There is a kind of carnivorous black ant, which specializes in eating the animal carcasses thrown away or died on the ground by people. After eating, it also carries the leftovers back to the nest for storage, which plays a good role in protecting the ground environment.
4. Earthworms: known as "soil cleaners".
In addition to stones, bricks, glass, metal, rubber, etc., earthworms can digest all other organic wastes and domestic garbage that can be decomposed and can be converted into organic fertilizers.