Probably because the land where the fish fossils are found was once under the sea.
Fish eggs come in a range of colors, depending on the species. While some may be clear or white, others can be orange, pink, or even black. The color of fish eggs is influenced by the specific pigments found in the species' eggs.
Characteristic of fresh fish:Smell· A fresh fish should have little or no smell. The digestive tract of living fish contains enzymes. When a fish dies, these enzymes help bacteria penetrate the stomach wall. This causes fish flesh to start spoiling. An ammonia-like smell or an overpowering fishy odor indicates the fish is no longer fresh. It is old or has spoiled from improper refrigeration.Scales and Skin· The scales of a fresh fish are tight on the skin, not loose or falling off or dried out. They are also bright, reflecting light easily, and have a metallic look. A very thin and clear mucus should cover the skin. Unscrupulous fish markets sometimes import fish dipped in a preservative chemical called formalin to appear fresher. If you're unsure, ask if the fish is really fresh or has been rinsed in a preservative.Flesh and Tail· A fresh fish has firm flesh that is not mushy or easily indented with your finger. It should not be separating from the bones. The tail should be very stiff with firm flesh as well. When buying a cleaned fish fillet, test the resiliency of the fillet's meat with your finger. Press down on the fillet. If the meat bounces back with its original shape, it is fresh. If the finger imprint remains, the fillet is about to spoil.Fish Eyes· The eyes of a fresh fish should be bulging, clear and shiny, not cloudy or sunken into the head. If the eyes are cloudy, faded, milky or dull, the fish has aged a few days and is approaching a non-usable condition. The exception to this is for naturally cloudy-eyed fish types, such as the fresh water walleye pike and large catfish. Some ocean species of fish also have eyes that cloud shortly after death, such as snapper, grouper and flounder.Gills and Fins· The gills must be red to pink, not gray or brown There should be no slime covering them. The fins should be intact, moist and and resistant to being pulled.
So called live-bearing fish give birth. The name live-bearer indicates that the fish bears living fry inside them, and after a certain gestation period she pops them out, like giving birth.
Pollack and haddock both end with the letter "k." Shark have gills, so they are fish too. There are probably many other fish too.
Sedimentary
fish
fish
Fossil
It is probably poo. Clear poo in goldfish usually indicates intestinal parasites. Start the fish on a cycle of anti-parasitic medicated food.
Probably because the land where the fish fossils are found was once under the sea.
Fish eggs come in a range of colors, depending on the species. While some may be clear or white, others can be orange, pink, or even black. The color of fish eggs is influenced by the specific pigments found in the species' eggs.
a fish that is clear and lives in the trenches
If by clear water you mean freshwater than the fish will have all sorts of problems. It will be more likely to get a disease, stress the fish out, weaken its immune system, and will kill the fish.
Probably salt fish; a salted fish - dried and salt added fish.
It is a "Gravid Spot". Yes it indicates pregnacy.
probably not. it depends what kinda of fish they are.