Sea cleaner is what animal
The animal called "sea cleaner" is seagulls. The gulls mainly feed on small fish, insects, mollusks, crustaceans and worms and grubs in the plowed fields.
In addition to this, seagulls love to pick up the scraps discarded by people on boats. They are regular visitors to ports, docks, harbors, and around ships, and sometimes gulls tail the ship as it sails along.
There are also gulls picking up food on beaches at low tide, which is why gulls are known as "harbor cleaners". The gull is a migratory bird, mainly inhabiting the Arctic tundra, forest tundra, desert, grassland rivers, lakes, ponds and marshes during the breeding season; and in winter mainly inhabiting the coast, estuaries and harbors.
Seagulls are the most common seabirds, moving in pairs or small flocks or flying in the air. On seashores, harbors, and fishing grounds rich in fish and shrimp, flocks float on the water's surface to swim, forage for food, fly low, and prefer to flock to waters where food is plentiful.
If the gulls fly close to the sea, then the weather will be fine in the future; if they wander along the seashore, then the weather will gradually get worse. If the gulls are flying high, or if flocks of gulls gather on the beach or in the crevices of the rocks, it is a sign of an approaching storm.