What's the problem with where fish farms are located?

What Are Fish? (Minute Science) - YouTube
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Fish have what is often described as a two-chambered , consisting of one to receive blood and one to pump it, in contrast to three chambers (two atria, one ventricle) of amphibian and most reptile hearts and four chambers (two atria, two ventricles) of mammal and bird hearts. However, the fish heart has entry and exit compartments that may be called chambers, so it is also sometimes described as three-chambered or four-chambered, depending on what is counted as a chamber. The atrium and ventricle are sometimes considered “true chambers”, while the others are considered “accessory chambers”.
The film shows that fish farming is far from perfect. What are the biggest challenges facing fish farming?
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The is found in nearly all vertebrates. It is a non-vital organ, similar in structure to a large . It acts primarily as a blood filter, and plays important roles in regard to and the . In cartilaginous and bony fish it consists primarily of red pulp and is normally a somewhat elongated organ as it actually lies inside the lining of the . The only vertebrates lacking a spleen are the lampreys and hagfishes. Even in these animals, there is a diffuse layer of haematopoeitic tissue within the gut wall, which has a similar structure to red pulp, and is presumed to be with the spleen of higher vertebrates. Kids learn what makes up a fish. What are gills and how do they breathe in the water?
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Notice how we sometimes use the word "fish" and sometimes the word "fishes?" What's the difference? It's a little more complicated than singular and plural. Scientists use the word "fish" to refer to animals of the same species, regardless of whether there is one individual or 20 individuals. The word "fishes" is used to refer to a grouping of more than one species. For instance, if you had 20 yellowfin tuna, all of the species , you would refer to them collectively with the word "fish." If you had a yellowfin tuna, a salmon, and a trout, you would refer to this group with the word "fishes" because they are all different species.The best bait iv found is.......... well it depends on where u are.. even in the same big lake, different schools of fish although the same breed will eat different baits.. I.E. I can fish one area in the lake for spotted bass using a watermelon colored plastic worm, and almost every cast has a bite. but in the same lake about 20 mins away, the fish don't want anything to do with that plastic worm.... instead they may like go after certain colored crank baits.. .. it all depends on what they are custom to eating where they live....The word "koi" comes from , simply meaning "carp". It includes both the dull grey fish and the brightly colored varieties. What are known as koi in English are referred to more specifically as in Japan (literally meaning " carp"). In Japanese, is a for another word that means "affection" or "love"; koi are therefore symbols of love and friendship in Japan.I am from Minnesota land of 10,000 lakes i am a walleye fisherman where it takes a lifetime of knowledge to produce fish and not everyone can do it. cats are what we call trash can fish if you tried bringing stinkbait around here you wouldnt be allowed in the boat the fish are a lil smarter up here you have to learn the enviroment and ecosystem for each lake understand and know that depth and presentation for every lure in your box to trigger a strike its not the same as just chunking a big stinky piece of whatever out there and waiting we work for our fish not tryn to put anyone down by any means just sayn its two different worlds and ifyou ever ate some good walleye or even crappie or perch out of some cold water you would prob not think so much about cats but whatever floats ur boat that what we say good luck to all of you