CATDOLL : CATDOLL: Can an ordinary fish tank be used to raise animals like jellyfish, cuttlefish, and squid? Are there freshwater versions of these animals? Are they available on the market?

1. Can ordinary fish tanks be used to raise animals like jellyfish, cuttlefish, and squid? Are there freshwater versions of these animals? Are they available on the market?

Of course!

But raising animals like jellyfish, cuttlefish and squids requires certain equipment, such as sea salt, which is not expensive in the market.

Moreover, the live jellyfish that can be found in the market now are generally farmed and not very toxic. It is better for the host to prepare a fish tank with a lid. After all, animals such as jellyfish, cuttlefish, and squid can jump.

I have 7 jellyfish at home. They look very nice, especially when illuminated by light. But the only problem is that they require quite a lot of feed.

Can

No, jellyfish and squid are marine creatures and need seawater.

Yes, but very rarely. Tourists are allowed to catch small jellyfish at the beaches abroad.

2. Can you help me download the 50-cent pond culture technology of Mansoni squid from CNKI? Thank you.

It has been sent to your email, please check it.

3. Do squids have any unique habits?

The squid has a flat, soft and easy-to-use body, which is very suitable for living on the seabed. The squid moves quickly and can quickly escape when it encounters an enemy attack. It not only escapes quickly, but also hunts quickly. The squid can change its color by adjusting the size of the pigment sac in its body to adapt to the environment and escape from the enemy. The squid has an ink sac in its body, which contains thick black ink. When it encounters an enemy, it will quickly spray out, dyeing the surrounding seawater black to cover its escape. There are millions of red, yellow, blue, black and other pigment cells gathered in the squid's body, which can react within one or two seconds. The squid usually moves slowly in a wave-like manner, but when it encounters danger, it will leave the strong enemy behind at a speed of 15 meters per second. Some squids can move at a maximum speed of 150 kilometers per hour.

Giant squid

The body of a giant squid is usually only 30 to 50 centimeters long, but the largest giant squid can grow to 21 meters or even longer and weigh up to 2,000 kilograms. Their eyes are surprisingly large, about 5 centimeters in diameter; the diameter of the suction cup is also more than 8 centimeters. The giant squid lives in the deep sea, feeds on fish, and can catch prey in the dark sea water. People have not seen giant squids in their habitats, and can only learn about them through those giant squids that float to the surface after death or injury.

4. Are there giant squids in the world?

The top 10 giant unidentified creatures that were actually photographed:

1. Deep Sea Dragon Fish

Although the deep sea is pitch black, there are still many unknown giant terrifying creatures in the deep sea, which does not prevent the birth of some creatures that are naturally bright and colorful. 1,000 meters underwater, it is basically pitch dark. And many deep-sea creatures have the habit of swimming to the surface of the sea to feed at night. Generally, they rely on the faint moonlight and starlight.

However, it is inevitable that some careless passengers mistakenly get on the deep-sea dragon fish's car and become its meal.

2. Frilled Shark

It is considered a living fossil by scientists. They are two meters long, but they can still catch larger prey. Unlike other shark species, it has a unique front jaw structure, and needle-like teeth that help them prey on soft squid, which is their main food. But divers were shocked when they discovered this unknown giant horror creature in the deep sea, and they thought it was a big sea snake until scientists finally confirmed its identity.

3. Short-legged double-eyed hook shrimp

The short-legged double-eyed hook shrimp is not huge, with a body length of between 2-5 cm. Its body is grayish white, close to bleached white. They have a strange habit - feeding on wood such as coconut shells. This kind of shrimp is different from ordinary shrimp and looks very strange. It exists like a ghost shrimp in the deep ocean.

4. Faceless Fish

Because it is pitch black in the deep sea, you can hardly see anything, and the eyes of many creatures have gradually degenerated. But unexpectedly, this fish not only does not want eyes, but also does not want a face. According to official introduction, this faceless fish is a kind of weasel fish, which was caught 4,000 meters underwater. This unknown giant horror creature in the deep sea is really scary! No wonder there was a legend on the Internet that the divers of the Jiaolong were scared crazy.

5. Nail Crab

There are many crustaceans living in the deep sea, including this red long-legged crab with thorns all over its body. But in fact, this nail crab is not a real crab, but more like a hermit crab, which is between shrimp and crab. Here are some pictures of deep-sea shrimps, each of which is also wearing armor! It's easy to get hungry when you look at it late at night!

6. Sea Spider

This is not a real spider... It is just a spider-like worm. The most peculiar thing is that it has no special respiratory organs and digestive system, just like a few straws tied together. Gas exchange is carried out in the cuticle, and the legs (those straws) circulate blood instead of the heart... No wonder scientists wrote in their sailing diaries that sea spiders are the best model for designing alien creatures!

7. Carnivorous sponge

These mace-like siliceous sponges capture prey using the siliceous needles throughout their bodies, and once the prey is captured, it is quickly digested.

8. Deep Sea Lizardfish

The most terrifying one finally appeared!!! This is the real monster in the deep sea! It should be the one with green face and fangs! However, it is not easy to be the king at about 2000 meters underwater. First of all, it is hard to find food; secondly, it is hard to find another deep-sea lizardfish; thirdly, it is even harder to find another deep-sea lizardfish of the opposite sex... Therefore, this lizardfish has evolved the ability of hermaphroditism.

9. cK fish

As one of the unknown giant terrifying creatures in the deep sea, the name of the cK fish is really incompatible with its appearance. You can't imagine that there is such an ugly creature in the world. Its other name "sea ghost fish" is really suitable for it. However, it is said that its meat is delicious. However, some netizens still said that I would rather meet a shark than this kind of fish! It really looks numb.

10. The family of giant fish

Also called stoplight loosejaw, although the fish is not big, it looks very vicious. Its lower jaw has no skin, and the jaw joint is open, so it can open very wide. In addition, it has a light-emitting device under its eye that can emit red and green light, like a traffic light.