The most common way that they dye fish is through dye injection through use of a syringe.
Fish are most often injected with the dye multiple times and the fish may also be dipped in caustic solution to strip the fishes outer slime coat and then dipped in dye.
Dye fish with this method is very likely to kill the fish as well, especially if not done correctly.
While dyes don't typically hurt fish or other aquatic animals, they can affect desirable submergent plants that fish and other aquatic life may use for food and habitat.
There are three common dye colors available for use: blue, black and a mix of the two imparting a deeper color to the water.
Scientists group fish into three main types.
They are divided into these groups because of the structure of their mouths and the types of skeletons they have.
There are jawless fishes, cartilaginous (cart uhl AJ uh nuhs) fishes, and bony fishes.
All three types are "cold-blooded," or ectotherms.
Fishes are a group of animals that are completely aquatic vertebrates that have gills, scales, swim bladders to float, most produce eggs, and are ectothermic.
Sharks, stingrays, skates, eels, puffers, seahorses, clownfish are all examples of fishes.
The biggest fish in the ocean is the Rhincodon typus or whale shark.
Despite their tremendous size and intimidating appearance, whale sharks are commonly docile and approachable.