In the ocean world, most fish are good at swimming and hope to evolve stronger swimming ability, but there are also some fish whose swimming ability is slowly degraded, such as this fish all over the ocean - bass fish (pinyin: yìn yú), on the top of the head of the bass, there is an area that looks like a "shoe print", which is their degenerated dorsal fin, which has now evolved into suction cups, so they have very poor swimming ability, but they are all over the ocean, and even sharks will become their mounts, which is a very peculiar fish.
The "shoe print" area of the bass seems to be connected externally, but this is a part of the body connected to the bass, and this "shoe print" area has a unique role, the shoe print is in, the fish is in, so this fish is also called the sole fish, which is that they have evolved a suction cup ability shaped like the sole. It just looks like someone stomped on it and left a big shoe print.
This "shoe print" of the bass can make it footprint all over the world, because this "shoe print" has the adsorption capacity, this suction cup is usually filled with water, once close to the large fish, you can eliminate the water inside, to achieve the effect of adsorption, so they can be adsorbed on sharks, turtles, whales and other large organisms, although the swimming ability of the bass is poor, but the adsorption capacity is strong, to where to take the "hitchhiker", to reach the food-rich area, it will automatically fall off, looking for food.
The bass is also a carnivorous marine fish, feeding on other fish and invertebrates, it does not worry about having no food source, because it has a strong adsorption ability, and never cares about the host object, it can be a ferocious shark, a whale, or a small boat, as long as it can set off the tool, it can be adsorbed. There is no food in this place, it will wait in place for a large shark or other underwater animal with strong swimming ability, and then rely on the suction cup of the head to absorb on it, and be taken to all corners of the world, so that it is constantly circulating, and it is stepped on a shoe print, but it can be a fish that travels the world for free!
Shark as one of the top predators of the ocean, the bass is helpless, when adsorbed by the bass, in the face of its strong adsorption ability, it is impossible to shake off, more can not swallow, because there is no hand, sharks are difficult to swallow bass from their backs, bass is the use of the disadvantage of large fish inflexible to stabilize adsorption, bass will also eat the remnants of the big fish food, ectoparasites, or catch invertebrates in the shallow sea, so the food source of the bass is very rich.
In the eyes of humans, catfish can be adsorbed on the body of the special ecology of large fish, welcomed by the aquarium, is an ornamental fish, but also a kind of edible fish, but also has a certain medicinal value, but due to the strong adsorption force, so that they have a wide range of distribution, coupled with strong reproductive ability, stable population trend, not close to the fragile endangerment threshold standard for species survival.
Pay attention to the six dimensions of nature And let nature know nature!