What is Hydroseeding? Hydroseeding is a method that can be used for planting grass for purposes of erosion control, or to grow new lawns entirely; it has been around since the 1950s. It is also an efficient, inexpensive alternative to laying sod in an area where grass or a lawn is desired. Hydroseeding can also be referred to as hydraulic mulch seeding, hydromulching, or hydroseeding. How does it work? The machine that actually does all the work for you is called a hydroseeder.
The skin of a shark is made of tiny denticles, which are made of the same enamel that teeth have, meaning they too can fossilize. Some more primitive sharks have spines in their fins that will fossilize. Finally, shark feces, or coprolites, are sometimes found preserved.
Coloration. Sharks are generally a dark color on top, which is called their dorsal side, and a light color on the bottom, which is called their ventral side. Predators looking down might not see the dark top of the countershaded shark, because it blends in with the dark ocean depths.oloration. Sharks are generally a dark color on top, which is called their dorsal side, and a light color on the bottom, which is called their ventral side. Predators looking down might not see the dark top of the countershaded shark, because it blends in with the dark ocean depths.