1 When Denzel Washington talks about challenging death to a wrestling match, you suddenly sense that everythingâs going to be all right.
Now we know that fish with scales AND fins are equipped with a digestive system that prevents the absorption of poisons and toxins into their flesh from the waters they call home. Flounder, cod, haddock, and salmon are a few examples of fish with scales and fins. Catfish have fins, but do not have scales. These scavengers are primarily bottom feeders and have digestive systems designed to absorb toxins from the water. Clams, lobster, shrimp, crabs, mussels and squid do not have scales or fins and are believed to be highly toxic. They naturally absorb all the toxins in the water they live in.
Such scales have a definite size and do not grow along with the animal. Instead when the animal's growth opens up a large enough space between two or more denticles a new one grows to fill the space. The scales/denticles of cartilaginous fish are discrete, they do not overlap as do the scales of bony fishes.In the images below show that part of the scale which is embedded in the skin of the fish as coloured orange, (however in reality it is not coloured like this) and the part we see as coloured grey.ther species, like the Common Eel appear to have no scales but they really have microscopic scales deeply embedded in their dermis. Even in those fish that have scales they do not always cover the whole body. The size, and distribution of scales over a fish's body often, but not always, reflect the way it lives.