Fish

Pooka fish r very rare. and they smell like pooka

10

brown trout bass blue gills

Whales, dolphins and porpoises are all mammals (there is an unrelated fish also called the Dolphin or Dolphinfish). These mammals evolved from extinct hoofed carnivores and gradually adapted to an exclusively marine life. Their similarity in form to fish is an example of convergent evolution; anatomical similarity to land mammals confirms their true origins.

"The origins of Fish Philosophy go back to John Christensen's observations of the Pike Place Fish Market in Seattle. Christensen observed that the employees had great fun while interacting with their customers who also enjoyed the experience. As a result of his observations Christensen formulated the four key concepts of the Fish Philosophy which are Play, Make the customer's Day, Be engaged and there for coworkers, Choose your Attitude."

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Most of them come under the subclass "Actinopterygii"

Fish are shaped in a variety of shapes,including flat,round etc.

In general, yes, most of them mate for life. However, usually if one is killed by a predator then the survivor will seek a new mate, but not before it's chicks are mature and ready to fly.

You can get a variety of fish in the local fish market. The most common include guppies, tetras, and platys. If you are a beginner, I would recommend getting guppies and platys, as they are very undemanding and can cope with different kinds of changes. However, if you plan on getting guppies, please keep in mind that guppies breed very often and you may end up with more fish than you originally anticipated! Another fish that is commonly sold is the goldfish. For more information, ask your local Petco or Petsmart. You can also visit their websites to get a general idea of what kinds of fish are available at the links provided below.

Gas exchange in fish involves the gills.

The gills are on either side of a fish's mouth, and they're made up of a curved gill arch attached with a v-shaped double row of gill filaments. These gill filaments have on them little bumps called lamellae and it's in these that gas exchange takes place.

The Lamellae are very small, only a few cells wide and have a very thin surface for gases to diffuse through into the capillary network, so oxygen can be circulated around the body to cells. Since there are so many gill filaments and so many lamellae on them the surface area for gas exchange to take place is huge.

The disadvantages of gas exchange in fish is that gas exchange occurs underwater. Water has much less oxygen dissolved in it than air, and it has 50% more viscosity so it's more resistant to flow. Bony fish have overcome these problems by adaptions

1) Having a counter current circulation of blood in the lamellae, which means that the water that flows over the lamellae meets the most deoxygenated blood which is flowing in the opposite direction to the water. Oxygen in the water then diffuses into the deoxygenated blood through a concentration gradient. The water moves along the lamellae and loses more oxygen as it goes on. Carbon dioxide is also diffused out of the fish in this way. The deoxygenated blood starts off with plenty of carbon dioxide which it doesn't want, and travels along in the opposite direction to the water coming in. The carbon dioxide then diffuses out of the blood to the water which has a much lower CO2 concentration. Losing more CO2 as it goes on and gaining more O2 so in the end the blood is fully oxygenated. This gas exchange system is extremely efficient for the fish and enables it to extract 80% of the available O2 from water as opposed to humans who can only extract 25% from the air.

2)The water is continuously flowing over the gills in what's called a one-way flow, this means there's no dead space like in human lungs.

The other problem with gas exchange under water is that temperature affects the rate of oxygen diffusion greatly. A higher water temperature means less oxygen dissolved, and a lower temperature means more. So fish cannot survive very well in waters of high temperature. Also the gill filaments are supported by the buoyancy of the waters so that water can flow between them, but in air the gill filaments stick together.

Counter current flow only occurs in bony fish (eg goldfish, snapper) not in cartilaginous fish (sharks).

put and x on the side of the boat

Insecta.

No. There is not such thing as too much oxygen just too much carbon. It is good to have a lot of oxygen so the fish dont die because of no oxygen.

in order to make your fish grow faster, you should feed it nutrient rich foods such as baby brine shrimp, black worms, blood worms, white worms, mysis shrimp, etc. some fish like killifish are actually insect eaters and thrive on fruit flies. live foods or foods that were once alive are always better to boost growth than say, flake food and pellets. if your fish is a vegetarian, spiralina flakes or pellets would then be your best bet. *for baby brine shrimp, they are always the most nutritious when they are newly hatched (preferably 24hrs old). this is when they still have their yold sac, especially great if you are raising fry. another important factor is good water quality. performing at least a 10% water change once a week will also help your fish grow and keep them very healthy.

yes you can it makes the fish bite more it makes them come out of their hiding place

There are only a couple that don't attack human but Great White Sharks, Tiger Sharks, Bull Sharks and The Hammerhead Sharks are the most common to attack human but others may if you look like pray

A Mexican walking fish otherwise known as an Axolotl is called a walking fish due to the fact that it has a fish shape, but it also has four legs which it uses to 'walk' on the bottom of the water.

The Sunlight Zone

white sturgeon are approximately 20.5 feet 1,800 pounds

The range of yellow perch in Wisconsin would be the entire state state including the great lakes

A sword fish is a fish due to it having gills, and a bone structure, unlike a shark that has cartilage, or a mammal that has lungs.

No fish give birth in the same sense that mammals do. However, many sharks, as well as guppies bear live young through a process called vivipary. There are many different forms of vivipary but the concept is the same. The male copulates with the female, embryos develop inside some sort of egg-like sac inside the mother into young fish, and live young emerge from mother fully functional

I would say 14 gallons if you want a long life for that fish

But generally 1 inch of fish= 2 gallons