Why does the biology book say that seahorses are not fish?

Seahorses are fish. The seahorse gets its name from the fact that its head resembles a horse's head, but interestingly it is a strange and precious small fish in the shallow sea near land.

The ancients said that it is better to believe in books than to have no books.

The nine planets in the textbooks are now not eight.

Seahorses seem to be invertebrates.

Seahorses are viviparous, and interestingly, the female seahorse gives birth to a baby with a male seahorse, and the male seahorse has a nursery bag, and eventually the baby seahorse grows up, and people will find out that it comes out of the belly of the male seahorse, which once led humans to think that the seahorse was conceived by a male.

Seahorses have fins, breathe with gills, conform to the basic characteristics of being fishes, and currently classify them in the family Hydrosauridae in fishes.

To correct the statement upstairs, the hippocampus is not viviparous, but ovoviviparous, the difference between the two is that viviparity is the embryo that grows up through the mother's absorption of nutrients, while ovoviviparity only allows the egg to hatch in the body, the former has tissues and organs such as the placenta and umbilical cord, and the latter does not. There are many fish that are ovoviviparous, so the way the seahorse reproduces is not special, for example, the peacock and Mary in tropical fish are ovoviviparous.

Curious to know which biology book you're referring to?

Seahorses are warm-born, but the female seahorse lays her eggs into the male seahorse. So he's a fish. And he has cheeks. He's really a fish! You read it wrong!

Since the teacher is teaching you.

Why don't you ask him?

Seahorses are milky animals that only live in the ocean, just like whales.

Fish are oviparous and seahorses are viviparous.

Seahorses are fish in the sea that generally live in tropical oceans. In appearance, they have a horse-like head and a tail that resembles a monkey's tail and can curl freely, so they don't look like fish. However, seahorses are indeed a type of fish, and they belong to the class Bony Fish, which is categorically a bony fish.

They have some characteristics in common with fish, such as the fact that they use gills to breathe. For example, they swim with the help of the swing of their fins. <

A seahorse is a creature that lives in the ocean. They have a peculiar appearance, their heads are more like horses, hence the name, and their tails are more like monkeys' tails, which can bend freely and even make them wrap around the plants. It can be seen that they do not look like fish on the surface, and the most obvious feature of fish, the fins are not obvious on the hippocampus, because although seahorses also have fins, they are very small and transparent.

But in terms of category, seahorses are of the class Bony Fish, that is to say they are a class of Bony Fish.

As mentioned above, seahorses have very different appearance characteristics from fish, and they are still named after "horses", but they belong to fish from the category point of view, and they are a bony fish. This is because, although they look like horses, they have some essential characteristics that are the same as those of fish.

For example, fish breathe with gills, and seahorses breathe with gills, so if you look at them up close, you can see signs of their breathing. In addition, fish have fins and use them to swim. Seahorses also have fins, although they are small and transparent, but they can be observed if you look closely.

Seahorses have dorsal fins, pectoral fins, and so on. Seahorses also need their fins to swim. When they are moving, the fins swing very quickly, especially their tail fins.

Seahorses are fish. Although seahorses do not look like fishes in terms of appearance, their characteristics are the same as those of fish. Seahorses reproduce by oviparous, using gills to breathe and fins to swim, all of which are consistent with the characteristics of fish.

Seahorses are creatures of the genus Hippocampus of the family Nethonythidae, the radial-finned subclass of the class Neost Fishes, and belong to fishes.

The shape of the head of the seahorse is very similar to that of a horse, hence the name "seahorse". However, horses belong to mammals, while seahorses are fish.

The category of seahorses cannot be judged by their appearance characteristics, nor can they be mistaken for not fishes, in fact, seahorses belong to the class of bony fishes, which are one of the fish in the sea.

The special respiratory organ of fish is the gills, which are different from those of other animals such as mammals. Seahorses use gills to breathe and belong to fish.

Seahorses belong to fishes, and it belongs taxonomically to the class Bony Fishes. Because it breathes with gills, it has vertebrae, dorsal, pectoral and caudal fins, and is named because its head resembles a horse's head.

The hippocampus has a slender, quadrangular tail and can be curled. This allows the seahorse to hook the seagrass with its tail and stand upright in the water. It is generally about 10 centimeters long, and it is named because the head is a bit like a horse.

Living in the seaweed bushes of the waters, it is a valuable medicinal material, which has the effects of fitness, pain relief and heart strengthening.

The genus Hippocampus is a bizarre small marine fish that grows between 5 cm and 30 cm in length. It is named because the head is bent at a near right angle to the body.

Mode of exercise

The structure and function of the tail of a seahorse is very different from that of other fish. The seahorse at the time of perching takes advantage of the curling ability of the tail to wrap itself around the stem and branch of the seaweed. Therefore, seahorses mostly inhabit areas where deep-sea algae flourish.

The swimming posture is also very special, with the head upward, the body slightly obliquely upright in the water, and completely relying on the dorsal and pectoral fins for movement, and the fan-shaped dorsal fin plays the role of wave propulsion.

Seahorses are fish.

The hippocampus (Latin scientific name: hippocampus) is a small marine animal with a length of 5 30 cm. It is named because the head is bent and the body is close to a right angle, the head is in the shape of a horse's head and forms an angle with the body, the snout is long and tube-shaped, the mouth is small, and the dorsal fin is one, all of which are composed of fin bars.

The eyes can move independently.

Seahorses are slow to move, but they are highly effective at catching fast-moving, hiding-minded copepods in the Atlantic, Europe, Pacific, and Australia.

Predatory habits. Among fish, seahorses are unique in their curved necks, similar to their long muzzles and heads, similar to those of horses. The overall shape of the seahorse, combined with the lack of a tail fin, makes them the slowest swimmers on the planet.

They do not swim fast and usually only resemble seaweed, tied to the bottom of the ocean with their curly tails.

Because all sea creatures love to eat copepods, they are extremely sensitive to fluctuations in water ripples caused by the proximity of predators. Copepods can swim up to 500 times their length per second when they detect an enemy approaching. In contrast, cheetahs, which are known for their speed, travel only 30 times their length per second.

Seahorses are fish. Although it is far from a fish in appearance, it actually breathes with gills and relies on its fins to swim in the water. It belongs to the genus Hippocampus of the order Ichthythidae, with a body length of about 5-30 cm, a head like a horse, and a dorsal fin composed of fin bars, which can move independently.

Although it is sluggish, it can catch forepods and is widely distributed in all oceans. <

Seahorses are fish. Although it is far from a fish in appearance, it actually breathes with gills and relies on its fins to swim in the water. It belongs to the genus Hippocampus of the order Ichthythidae, with a body length of about 5-30 cm, a head like a horse, and a dorsal fin composed of fin bars, which can move independently.

Although it is slow, it can catch copepods and is widely distributed in all oceans and has a wide variety of species.

1. Breathe with gills: The seahorse is a fish because it has the characteristic of having gills to breathe. The gills are different from the lungs of terrestrial animals in that they mainly get oxygen from water, and when the water flows through the gill filaments, the gas is exchanged.

Of course, it's not just fish that breathe with gills, amphibian larvae also have gills, and some aquatic crustaceans do the same, so look at other characteristics.

2. Have fins: As we all know, fish have fins, and seahorses also have fins although they look different from fish. It does not have pelvic and caudal fins, the dorsal fin is between the trunk and the tail, and the anal fin is relatively short, but the pectoral fin is well developed.

Unlike most fish that move with their tail fin, seahorses rely mainly on their dorsal fins for swimming.

3. Life in the water: Seahorses live in the water, usually like to stay in the slow flow of coral reefs, are not good at swimming, and usually have to fix themselves with the help of corals and other objects to avoid being washed away by the rapids. Due to the anatomy and other reasons, this animal is sluggish, but it is still very efficient at predation.

Seahorses belong to fish because, like fishes, they breathe with gills and have spines and fins that match the characteristics of fish. Seahorses belong to the category of fish. They share some common characteristics of fish.

For example, they all live in water, have spines, and the surface of their body is surrounded by scales. Seahorses usually prefer to live in the slow currents of coral reefs. Since they are not good swimmers, they often use their sessile tails to attach their bodies to the branches of corals and the leaves of seagrass to prevent them from being washed away by currents.

Most species of seahorses live near estuaries and seas, so they can adapt to different concentrations of seawater and even survive in freshwater. The most common seahorse is a dried mummified body soaked in corpse water (wine), but the living seahorse is an elegant creature that stabilizes itself by hooking the protrusions in the sea with their curly tail (which is actually an extension of the spine, and their caudal fin is remnant). Seahorses have unusual habits.

Typically, its tail is curly, wrapped around the stems of seaweed, and occasionally hangs upside down to float on other objects.

When it is necessary to eat, it is common to leave entangled objects behind, but it is not long before other objects are found to attach to it. Stand upright in the water and swim gracefully. It is only through the high-frequency oscillations of the dorsal and pectoral fins that it is possible to slowly swim a long distance.

Seahorses are a type of fish. It is generally about 10 centimeters long, and it is named because the head is a bit like a horse. Kelp, which lives in the water, is a rare medicinal herb that has the effects of fitness, pain relief and heart strengthening.

Seahorse is a fish, taxonomy it belongs to the class of bony fishes, although seahorses also live in the water, breathe with gills, swim with fins, but it is not the same as other ordinary fish, it is a relatively special group.

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Seahorses belong to fish, are a type of fish that live in water, have scales, and breathe with their gills.

Seahorses are fishes, and because seahorses and fish have the same characteristics and use gills to breathe, they belong to fish.

The seahorse is also a type of fish, because the fish breathe with the same gills, which match the characteristics of the fish's spines and fins.