Shellfish: description

In this article we will find out what the shellfish (placoderm) is. Where is it in natural conditions, can it live in a home aquarium, besides, can it be with other fish in a common body of water?

Shellfish fish dunkleostey

Dunkleostey is a shellfish extinct fish, which is known for skulls, whose age is 360 million years. Their remains were found in Cleveland, Ohio, Tennessee, Pennsylvania, California. Other dunkleostids were found in Russia, Poland, Morocco, Belgium.

Dunkleostey covered with outer thick plates. Although, unlike the other placoderms, his smooth armor did not cover the entire body, but only the small front part with the head together. To be more precise, in the process of evolution, the lateral and dorsal plates were shortened somewhat, while the rest of the body remained free of them, thereby making it possible to maneuver freely, and, when pursuing prey, to develop a decent speed.

Pectoral fins protruded far to the side, like a shark. Probably, the protrusion of the fin in the side exceeded half the width of the body of the fish. In pectoral fins, the artodoric contours were similar to the contours of the fins of the cartilaginous Paleozoic. Probably, the structure of the pelvic fins was similar.

Description

Fish panther pike (sargan) lives in the reservoirs of Central and North America, as well as in the Caribbean. She prefers a little brackish or fresh water. It is rare enough, but it also falls into the sea.

Some researchers say that the shellfish on our planet lived in the Cretaceous era - 200 million years ago. In America and Europe, the remains of this fish were found. Today there are 7 varieties of such pike in the world.

The shellfish, the photos of which are presented in this article, grow to impressive sizes. Although very large specimens are rare. The largest pike pike reaches 130 kg in weight and more than three meters in length. Her appearance corresponds completely to the character - she is very aggressive and, as the locals say, is dangerous. Predator in the fight with another fish with sharp teeth digs into the victim's head, and then bites it. Then she returns to the body of her prey in order to continue the meal. There are cases of attacks of these fish even on humans.

Application

Shellfish fish are rarely used for food, but its meat is quite edible. In some markets in Central America, it can be found on sale. Of greater interest are the sargans for sports anglers, specialized in catching various exotic individuals. We must admit that not everyone can catch such a giant. Yes, and find it in shallow overgrown ponds is very difficult. Under the force of this is only an experienced fisherman.

Spotted spotted pike

The shellfish is also called spotted shellfish. She is a predatory fish. It grows to 1.2 m. The largest known weight is 4.4 kg. The duration of her life is about 18 years. The body can be painted in several colors - from brown to light olive shades. It shows a pattern of spots of darker shades. The lateral sides are slightly lighter than the back, while the belly is almost white. Slightly rounded caudal fin. Dorsal and anal fins consist of nine or seven rays.

This fish lives in Mississippi, as well as other rivers that flow from Noeses to the west of Florida flow into the Gulf of Mexico. She chooses brackish water.

Aquarium pike pike

At the present moment this representative of predators is very common. Shellfish in large aquariums reaches 30 centimeters in length. In small containers such a pike quickly ceases to increase in volume and grow.

Its scales are hard as a stone. It is located oblique rows and resembles its shape decorative slabs. This fish has a beak-shaped muzzle, with long and narrow jaws, strewn with a huge number of teeth.

Features of the structure

This fish has an unusual anatomical structure. Her vertebrae do not have depressions on both sides present in the rest of the fish. They are deepened on one side and convex on the other. This structure is more characteristic of amphibians. In the armored pike, the swim bladder also participates in breathing.

This is a single large individual, suitable for a spacious and capacious demonstration aquarium. Fish attracts the interest of specialists due to external similarity to the usual Middle European pike. At home, usually contain not old fish, although even they are quite aggressive to all other inhabitants of the tank.

Content

At the present moment there is a tendency to have predatory fish at home. Many believe that looking at the tiny and quiet inhabitants of the underwater world is rather boring. While predatory large fish, their morals - this is actually interesting. Connoisseurs of exotics appreciate a daring temper and a manifestation of aggression.

A bright representative of the community and an incredibly popular inhabitant of aquariums is the shell pike. To home, she reached 30 centimeters, she needs an aquarium with a volume of at least 150 liters. In this predator, the dimensions depend directly on the parameters of her home. In aquariums, the most popular is spotted spotted pike.

This fish prefers to live in the upper parts of the water. Its neighbors are mostly larger. They dwell in the lower layers - this allows them to peacefully coexist with the predator we are considering.

Requirements for water and aquarium

We told that to keep these fish you need a large aquarium. If you want to grow a large individual, you will need a "pond", the volume of which will be at least 500 liters. The water must have the following parameters: stiffness - dH 17, temperature - 20 ° C, acidity - pH 8.

For the content of such pike, filtration of water and aeration are required. There should be few plants - much more important for a fish, free for swimming.

Food

Experienced aquarists say that these predators do not suffer from lack of appetite. They eat small fish in an incredible amount. In other words, the armored pike is incredibly gluttonous. Consequently, in caring hosts, it is most often possible to find in the aquariums of well-fed individuals resembling a floating log sometimes. Because of the greediness of these fish, you do not need to keep them together with small individuals.

Finally ...

Not so long ago in one of the television broadcasts, the Candidate of Medical Sciences of Sandomierz Mark said that in the Devonian sediments there are huge reserves of psychic destructive energy that left the twilight consciousness of shellfish, which are a huge danger for mankind. This broadcast caused a lot of rumors, conversations and mostly ridicule. We will refrain from commenting ...