According to foreign media, many freshwater fish have become household pets because of their bright and beautiful colors and special living habits. Here are 12 of the most peculiar freshwater ornamental fish: silver dragons, transparent ghost shrimp, lungfish, scavengers with sucker-shaped mouths, and more.
The ghost shrimp is transparent and its internal organs are visible
The ghost shrimp (Ghost? Shrimp) is often used as fish food to feed larger fish, but these years, people Shrimp are the most popular ornamental fish. In addition to their ease of feeding, people are deeply attracted to their special appearance, as shown in the picture. their internal organs are visible from afar. As long as predatory fish are not fed in the aquarium, ghost shrimp may susurvive and reproduce healthily.
Lanshou Goldfish - “Faceless” Goldfish
Goldfish have been bred artificially for many years, and many varieties have been formed during the artificial breeding process. Their eyes will look small. as big as blisters, or which have swollen cheeks or long fins. The Ranchu goldfish is even more unique. This species is very rare and its appearance is strange. It looks like a faceless goldfish. The tissues of the mouth and head make up the entire face.
Freshwater Eels
Freshwater eels are very similar to saltwater eels, but they are smaller, snake-shaped, and usually live under the surface. water.
Freshwater lionfish - like rocks on the bottom of the water
Freshwater lionfish is a predatory fish that closely resembles lionfish in salt water, and its living habitst are also quite different. different. They use their special physical characteristics to hide and stay still on the bottom of the water, resembling a stone, which is why some call this fish "stonefish". They do not attack until their prey comes within range.
The most expensive freshwater fish in the world
The Silver Arowana is a very special freshwater fish. It has large scales and a thin body. Fish have shorter fins and their bodies can usually grow. very long, which makes them popular among aquarium fish enthusiasts. This fish that lives in the rivers of South America has a remarkable characteristic: the slight movement of its body can cause white light to reflect off the fish's scales. Currently, the largest silver dragon costs tens of thousands of dollars in the ornamental fish market.
The lungfish - aclose relative of the first amphibians
The lungfish is considered a close relative of the first amphibians. Unlike other fish, it actually has lungs that can breathe oxygen from the air. . This fish is not pretty to look at, and thanks to its unique respiratory system, it can survive in poorly ventilated aquariums.
Gar - a slender carnivorous fish
The unique feature of the gar is its very slender body. It swims very quickly and is a carnivorous fish. It looks docile, but when it attacks its prey. it can be very bloody.
Cichlids: Attractive color and smooth body
Many types of cichlids can be seen in ornamental fish stores, such as tilapia. This fish is distinguished by its beautiful, eye-catching colors and smooth body, and often shares characteristics of some marine fish. Cichlids mainly live in waters such as Lake Malawi and thehe Lake Tanganyika in Africa.
Fish card - able to recognize the person who puts the food
Oscars are deeply loved by ornamental fish lovers. If they are placed in a larger aquarium, they will be able to grow. at very large sizes. One of its unique features is the ability to identify people who have placed food in front of the aquarium.
The rare freshwater rays are very large.
Freshwater rays are so rare that they are generally thought to only live in environments of seawater. Stingrays growing in freshwater environments are very large, requiring a larger aquarium to feed the fish.
Channa
The Channa, also known as the "snakehead fish", is a predatory fish with a unique appearance, although it is very valuable on the ornamental fish market, but some consider itnt. fish a risk of proliferation. Snakeheads dispersed from ornamental fish markets into North America's streams and lakes have the potential to wreak havoc on ecosystems.
Scavengers with sucker-like mouths
With their unique sucker mouths, scavengers feed primarily on algae. Aquarium experts generally recommend giving them to Scavenger ornamental fish enthusiasts because these fish stick to them. the walls of the aquarium and vacuum up the algae attached to them.
Since the range and density of vegetation in the ocean is much less than that on land, only areas of shallow tropical seas exposed to sun will grow dense seagrass beds. access to sunlight, plants cannot photosynthesize and naturally have very little of it. In other words, ocean plantsare only distributed in the photic zone.
The majority of plants in the ocean are algae, with more than 8,000 species of green algae. However, some algae are not plants but belong to prokaryotes and protists. However, there are very few true seagrass meadows. Only about sixty species are found in the world's oceans. They flower like land plants and have a high demand for sunlight, so they only live in muddy, shallow seas at low latitudes. limit.
The food chain in the ocean is different from that on land. The ocean is based on plankton, while the food chain on land is based on plants. The vast majority of ocean animals are carnivorous and can be divided into predators, filter feeders, scavengers and parasites based on their feeding methods.
Predation is the way most animals huntsailors, represented by sharks and toothed whales. They have high mobility and weapons to kill their prey.
Filter feeding involves using gills, baleen, tentacles and other organs to filter plankton from seawater for food, represented by baleen whales, whale sharks, basking sharks and barnacles. Baleen whales and filter-feeding sharks are both large but gentle and non-aggressive.
Scavengers make their living by collecting remains and dead animals. They are scavengers in the ocean. We often say that “when a giant whale falls, all things come to life.” The dead giant whale will be cleaned by these scavengers and nothing will be wasted. Most parasitic animals are parasites, and there are many types of parasites in the ocean. The most common is Anisakis, found in most peassea sounds. There are also some small sharks like the cigar shark that feed on other animals and bite their flesh. There are also herbivores in the ocean, such as manatees, green turtles and marine iguanas.
The order Sirenia is the only group of herbivorous marine mammals, divided into the manatee and dugong families. The tail of manatees is disc-shaped, while that of dugongs is forked. They all live in shallow tropical seas and freshwater estuaries, where lush seagrass beds can support them. Although the green turtle is not a complete herbivore, it is the most herbivorous among sea turtles.
The marine iguana is the only fully herbivorous marine reptile in existence. It only lives in the Galapagos Islands and evolved from American land iguanas that drifted to the islands. Marine iguanas feed on algae and seagrass on the rshallow reefs, and even adjust their size according to the density of the algae. During El Niño, the amount of algae is significantly reduced and the length of marine iguanas can be reduced by 20%. When the algae population returns to normal, marine iguanas also return to their original length.
In short, there are few plants in the ocean, and naturally there are few herbivorous animals.