CATDOLL : CATDOLL: What does zooplanktivorous fish mean?

1. What does zooplankton-feeding fish mean?

Filter feeding fish

Plankton-feeding fish are also called filter-feeding fish. Most pelagic fish and many small fish, as well as many fish fry, mainly feed on plankton. Silver carp, bighead carp and dace belong to this category.

Feeding fish refers to all fish except planktonic fish (mainly silver carp and bighead carp), including carp, crucian carp, grass carp, bream, tilapia, freshwater silver pomfret, mandarin fish, etc.

2. Is carp a predatory fish?

Yes, carp is an omnivorous fish that eats grains and cereals, as well as shrimps, bloodworms, insects, and earthworms.

3. Is carp a carnivorous fish?

No, carp is an omnivorous fish.

Carp is a bottom-dwelling omnivorous fish that eats both meat and vegetables. It has a wide range of food sources, a well-developed snout, and often digs mud to feed. Carp is also a low-level cold-blooded animal, whose body temperature changes with the water temperature. It does not need to consume energy to maintain a constant body temperature, so the total amount of food it needs to eat is not large. At the same time, carp, like most freshwater fish, is a stomachless fish, and has a short and thin intestine and a fast metabolism, so its feeding habits are to eat less and eat more frequently. The digestive function of carp is closely related to the water temperature, and its feeding is very seasonal.

4. Is grouper a herbivorous fish?

yes.

Grouper is an omnivorous freshwater fish that prefers to feed on plants. It is widely distributed in fresh and brackish water. In winter, it mainly feeds on algae and the rhizomes, branches, leaves, and fruits of aquatic plants. In spring, summer and autumn, it feeds on algae and the young branches, leaves, rhizomes, and seeds of some aquatic plants.

5. Can filter-feeding fish eat Microcystis and Anabaena?

Microcystis and Anabaena are some common cyanobacteria. They will reproduce in large numbers in some natural waters and may produce some toxic metabolites, which may cause some harm to aquatic organisms and human health. Therefore, in general, it is recommended not to let filter-feeding fish (such as carp, black carp, etc.) eat aquatic products that may be contaminated by Microcystis or Anabaena.

For these cyanobacteria, their main toxic components are microcystins and anabaena toxins. Different cyanobacteria will produce different types and amounts of toxins, which can have different degrees of toxic effects on various organisms. Some filter-feeding fish may be able to eat some contaminated algae or other toxic organisms in moderation, but if they eat too much algae or other toxic organisms, it may be toxic to the fish and eventually be excreted or die.

Therefore, in general, we recommend that filter-feeding fish not eat aquatic products contaminated by Microcystis or Anabaena to avoid potential food safety issues. If you are unsure whether a certain fish is safe to eat, it is recommended to consult relevant professionals or local fishery production management departments.

6. Is the black carp caught by lure a carnivorous fish?

From the perspective of feeding habits, the black carp is a carnivorous fish, and it is also a very ferocious carnivorous fish. It has a very strong ability to hunt. Many animals can become its food, and many species of fish and shrimp around can become its food. If you want to fish this fish, you can also use fish and shrimp. In addition, you can also use crickets, mole crickets, mantises, and even fat meat.

The scientific name of the crossbow fish is Erythrocephalus crossbow. The crossbow fish is named after its upturned mouth. It is a relatively ferocious freshwater fish. Most of them are distributed in the Yangtze River, Yellow River, Heilongjiang River and other areas. It belongs to the middle and upper layer freshwater fish. It mostly feeds on live bait such as small fish and shrimps. It is more active in summer and less active in winter. It likes to live in the middle and lower layers to hibernate.

The official name of the black carp is actually "black carp", also known as "white fish", "black carp mouth", "black carp", etc. This fish refers to the black carp species of the genus Black carp, family Cyprinidae, order Cypriniformes, class Osteichthyes. The body shape of this fish is relatively slender and flat, and its shape is more like a willow leaf. Their backs are bulging, their eyes are relatively large and round in shape. They have scales, but the scales are relatively small. There are very obvious hard spines on their dorsal fins, and the texture is hard. Their backs are silver-gray, their abdomens are silvery white, and the colors of the fins are slightly different. The weight of this fish is generally between 2-2.5 kg, and larger individuals can reach 10-15 kg.

Cockroach is a freshwater fish that lives in freshwater. They generally live in the middle and upper layers of the water and are common in many rivers, ponds, and lakes. In addition, they can also be artificially bred, and the freshwater breeding method is also used.

7. Is the pitcher plant a carnivorous plant?

The pitcher plant is one of the representatives of carnivorous plants. It is a carnivorous plant similar to the pitcher plant. It passively captures insects with a sac, which is also a predator. Under strong sunlight, the sac will appear purple to attract insects. When the insect slides into the sac, the glands in the sac will secrete special juice to surround and suffocate the insect, which will eventually be decomposed by digestive juice to provide the nutrients needed for the growth of the pitcher plant.

So how did plants like the pitcher plant become carnivorous? It has both carnivorous leaves (which contain fluids that can digest animals) and non-carnivorous leaves.

By biologically comparing the digestive juices in the leaves of the carnivorous pitcher plant with those of its three distant relatives - Drosera athyllis, Nepenthes philippinarum and Pitcher plant - the researchers found that genes involved in stress response in other plants have undergone functional changes in these four carnivorous plants, and their functions are equivalent to digestive juice proteins.

8. Will the big goldfish eat the small koi?

The big goldfish will eat the small koi. Goldfish feed on water fleas and blood worms, and are also considered carnivorous fish. As long as the small koi can take off the water fleas, such as the koi water splashes, which are no different from blood worms, it will definitely be eaten by the big goldfish.

9. Can rabbits be eaten by sheep?

Rabbits will not be eaten by sheep, as sheep are herbivores.

Sheep is a general term for the subfamily Caprinae, which belongs to the class Mammalia, order Artiodactylus, family Bovidae, and subfamily Caprinae. It is one of the domestic animals of mankind. It is a hairy four-legged ruminant animal and the main source of wool. The main color of the hair is white. Goats and sheep are mainly raised in my country.

Sheep is also called sheep or ram. It is a hairy four-legged ruminant. It is originally a product of the mountains in the northern hemisphere and is related to goats; the difference is that it is fatter, plumper, and has dense hair. The head is short. The male has large spiral horns, while the female has no horns or only small horns.

A mammal, a ruminant, usually with a pair of horns on its head. There are many species, such as sheep, lake sheep, goats, blue sheep, etc.

10. Can you tell the saltiness of marine fish from fresh ones?

Seawater contains a lot of salt, which is both salty and bitter, but the fish living in the sea do not taste salty. It turns out that in the gills of bony marine fish, there grows a kind of tissue called "chloride secreting cells" that has the special function of removing salt. The seawater that fish swallow and spit out is filtered by it and becomes fresh water when it enters the body. Marine fish rely on this ability to live freely in salty seawater.