5 Characteristics That All Fish Have in Common | Sciencing
have suggested that the () fishery is an environmentally responsible fishery.
fish live in loose shoals. They have a symbiotic relationship with the parasite eating senorita fish. When they encounter a shoal of senorita fish, they stop and form a tight ball and hang upside down (pictured), each fish waiting its turn to be cleaned. The senorita fish pick dead tissues and external parasites, like parasitic copecods and isocods, from the skin of other fishes.
Fish tend to prefer shoals made up of individuals that match their own size. This makes sense as predators have an easier time catching individuals that stand out in a shoal. Some fish may even prefer shoals of another species if this means a better match in current body size. As for shoal size however, hunger can affect the preference for similarly-sized fish; large fish, for example, might prefer to associate with smaller ones because of the competitive advantage they will gain over these shoalmates. In , large satiated fish prefer to associate with other large individuals, but hungry ones prefer smaller shoalmates.
What characteristics do all fish have in common
Half of All Farmed Fish Have Hearing Loss Due to Deformed Ear Bones
One reason fish are so diverse is that 70 percent of the planet is covered in water. The animals in this group live in a variety of habitats ranging from coral reefs and kelp forests to rivers, streams, and the open ocean. Another is that fish are very old on the evolutionary scale. According to fossil records, they have been on Earth for more than 500 million years! The total number of living fish species—about 32,000— is greater than the total of all other vertebrate species (amphibians, reptiles, birds, and mammals) combined.Fish have a specialized sense organ called a lateral line. It runs along the length of the body and is situated just under the scales. It consists of ducts that are filled with a fluid. The lateral line can detect vibrations and movements in the water. Even if there is no light, the fish can detect food and predators, and even navigate with the help of lateral line.All fish have gills present from the time they are born until they die. Gills are important organs for a fish, as they are responsible for respiration. They help to absorb oxygen from the water and give off carbon dioxide. The gills are located on either side of the head.For , Ving Salcedo asked what type of fish can live without water for a small period of time. It turns out quite a few have a fin in both worlds.