We believe that people who have seen "South Sea Hunter" will be very impressed with the plot of the episode, these Indonesian fishermen on small islands in addition to hunting large cetaceans and dolphins, also hunt a marine life called manta rays.

One manta ray can feed nearly 20 villagers, and one whale can feed nearly 2,000 people.

Although these fishermen's practices are condemned by many animal protectionists.

They continue to live this primitive fishing and hunting life, and manta rays are a creature that nearly became extinct because of human hunting.

It is a cartilaginous fish that lives in tropical and subtropical regions and has been on earth for nearly 120 million years.

Because their appearance looks very much like a bat carrying a virus, people subjectively believe that manta rays are the incarnation of the devil, so they are called devil fish.

The manta ray's unfolded body shape looks like an open cloak, and its English common name manta comes from Spanish, referring to a Spanish cloak.

In addition, manta rays have an angular cephalic fin on each side of their head, which is made by the forward extension of the pectoral fins.

And their huge bodies are easily reminiscent of the devil, so they are also called "devil fish".

The manta's body is very broad and flat, with a very slender tail at the end of its rectangular body, making it look like a fish from hell.

If you look at the appearance alone, manta rays are really scary, but the real situation is that manta rays are very docile and quiet fish.

Unlike other rays, manta rays rely on the constant flow of water to breathe, which is why they always swim with their mouths open.

The cephalic fin is a unique morphological feature of manta rays.

When swimming at full power, manta rays will curl their cephalic fins into a spiral at the front of their bodies to reduce drag.

Because Mobula rays are filter feeders, they spread their cephalic fins outward around their mouths to draw water and small plankton into their large, square mouths to filter through their feathery gills while feeding.

Similar to basking sharks, manta rays swim around in saltwater and are cruising filter feeders that often swim near coral reefs, but are not territorial and are not aggressive.

Although their intelligence is comparable to that of cetaceans and they are friendly to humans, they are often hunted and killed by humans.

Manta rays live in colonies and work together.

When they are hunting for plankton and fish in the sea, they will round up their prey into a circle and then start to eat together.

When feeding, manta rays open their mouths to allow seawater to flow into their mouths along with the food, then form a plume of gills through a rigid gill rake, and filter out the seawater, leaving only the food behind.

This feeding characteristic is very similar to that of basking sharks and baleen whales.