| scientific wormhole
As the old saying goes, "The world's martial arts, only fast is not broken", speed is not only the secret of the master to defeat the enemy, but also the weapon that many animals rely on for survival. Today we will take a look at the fastest top hunter in the ocean, the sailfish.
<h1 class="pgc-h-arrow-right" data-track="7" > dare and human tough sailfish</h1>
The swordfish belongs to the mackerel suborder, the sailfish family, the sailfish genus, many people will confuse it with the swordfish, in fact, they belong to different families, relying on the appearance is also very good to distinguish, look at the dorsal fin on the line.
The first dorsal fin of the sailfish is wide and tall, and looks like a flag waving in the wind, which is why people call it a sailfish. They live in the tropical and subtropical waters of the Atlantic, Indian, and Pacific oceans, and are more densely populated along the coast and in the waters adjacent to the islands.
The sailfish grows very fast, and the hatched fry is very small, about the size of a grain of rice; but it can grow to a few centimeters in just 3 days.
Newborn swordfish, humans seem to be able to pinch to death with a little force; but when they grow up, they are not easy to provoke at all. Adult sailfish are usually 2-5 meters long, weigh tens or even hundreds of kilograms, are muscular, and swim like off-string arrows.
When the sea is free to travel, neither prey nor predators can keep up with its speed. It is the champion swimmer of the ocean, with an average speed of 90 kilometers per hour and a maximum speed of 110 kilometers or even 130 kilometers per hour over short distances.
Sailfish are carnivorous fish, saury, sardines, octopus, etc., are its plate food. Scientists have observed the feeding process of Atlantic swordfish, and their rapid hunting method catches sardines off guard.
Sardines like to move in groups, and when they spot predators approaching, they form defensive bait balls that use collective strength against enemies.
The speed of sardines is also very fast, but in front of the fastest sailfish swimming in the ocean, it is a small witch.
When preying on sardines, some sailfish will launch a rapid attack and then ghostly appear less than a meter away. The sailfish swim around the sardine school, leaving it in a state of tension, selecting a target and immediately piercing it mercilessly with a sword-like kiss.
Even if the sardines are scattered, the sailfish can catch up with them at extremely fast swimming speed and swallow them. The swift speed and sharp long snout make the sailfish the top hunters of the ocean, and even they are not afraid of humans, daring to rush up.
Relevant information shows that during World War II, a British steamship loaded with oil was sailing at sea, but it was suddenly attacked. At first, the crew thought it was a torpedo, but then the hull was attacked for the second time.
The attack broke the swordfish's snout, and the crew learned that the culprit that caused the steel plate of the hull to break two holes was a 5-meter-long sailfish.
<h1 class="pgc-h-arrow-right" data-track="36" why is > so fast? </h1>
The swimming speed of the sailfish is breathtaking, I didn't expect that the fish that was just born the size of a grain of rice, but when they became adults, they became the top marine hunters, how did they get so fast?
Streamlined body + sword-like kiss
In order to adapt to life in the ocean, fish have evolved streamlined bodies, and sailfish are no exception, in addition to their sharper snouts.
We know that there is a lot of resistance in the water, and the sailfish have a sword-like spiky snout, which occupies a quarter of the body length. This "spear" not only has the effect of splitting water, but also can fiercely pierce the prey.
And when swimming, the sailfish can also put away their dorsal fins, reducing the resistance of travel.
Special body organs
Most marine fish hunt with a lot of stamina, so they hide and rest afterwards, but sailfish don't do it.
They live in more open areas and have strong hearts and gills. The gills of this large predatory fish have many times larger surface area than the average fish, so even if they suddenly carry out a huge activity, they can quickly replenish oxygen.
In addition, scientists have previously found that when swimming at a speed of more than 50 kilometers per hour, bubbles will burst in the tail of large fish, but the sailfish grows very fast, so that the cells lost because of high-speed swimming can be quickly replenished.
<h1 class="pgc-h-arrow-right" data-track="37" > conclusion</h1>
In the eyes of human beings, sailfish is not only the top marine hunter, but also a high-grade fish ingredient, the meat is tender and delicious, and has a high nutritional value. At the same time, it is also a target that many anglers want to conquer.
However, the stocks of sailfish are threatened due to overfishing. To this end, the United States issued a ban on fishing, and sailfish weighing less than 130 kilograms must be released.
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