If youare not knowledgeable about the differences youare not alone and the answers may surprise you. Fishes come in a vast array of shapes, colors and sizes. Yet, not all animals that swim in our oceans, rivers, lakes and streams fall under the fish classification. A prime Example of this is the shark which is classified as a fish, while the dolphin is considered a sea mammal and a member of the whale family. The nuances that separate both of these animals are rather subtle. A dolphin and a shark differ in a number of manners; a dolphin relies upon breathing in oxygen like a person than a fish.
Fertilization and Reproduction:
Most Fishes reproduce by a process called fertilization that is external. This implies a fish that is female releases her eggs into the water. This practice is called spawning. Most species of salmon spend part of their lives in the salt water of the Pacific Ocean but they will travel several miles to fresh water rivers and streams to spawn. Along the journey, their bodies change to a red color. Females release eggs across the bottom where males fertilize them. Both females and males die after spawning. The fish hatch and spend a year at the water that is new before traveling out to sea. The salmon return to the river as adults. They spawn and the cycle continues.Many Colors are developed by fishes. In many fish species, the male is more colorful than the female. He uses his bright colors to attract females and the color makes it easier for fishes.
Eggs and Hatching:
Fish Eggs can hatch anywhere between several days depending on their species, water temperature and conditions that are changing. Eggs vary in size from a sized that is visible scatter of the way. Some eggs float in water that is open, while some are heavier and sink to the bottom. Many Fishes travel to places or locations where conditions are right for protecting cach lam phan ca and spawning their eggs. This may be a matter of moving a few yards ahead to water or to a stream at a lake. However for others it may mean a lifetime journey of thousands of miles. Many fishes release their sperm and eggs into the water, paying no attention at all but nests are built by fishes and guard the eggs and young. In a few species the adults take eggs in their bodies. Some fishes keep the eggs until they hatch.Generally when fishes that are young hatch they might look different. A newly hatched fish might be nearly transparent but in a couple of days they develop colors and patterns. Salt water fishes grow in stages although fresh water fishes often resemble their parents.