Yellowfin tuna have yellow sides, blue backs, silver bellies and can weigh up to 450 pounds, whereas Pacific yellowtail have yellow stripes across their bodies, a yellow tail and weigh between 10 and 20 pounds when caught on a line. Yellowtail, or Seriola lalandi, is not a species of tuna and generally weighs less than a yellowfin, or Thunnus albacares.
Yellowtail are considered a delicacy in Japanese cuisine as an ingredient for sushi. These fish, called hamachi in Japan, are grown on farms and exported to other countries. As of August 2014, the longest yellowtail ever caught was more than 8 feet long, and the largest specimen ever recorded weighed more than 213 pounds. Yellowtail live in subtropical waters all over the world. Yellowtail feed on mackerel, sardines, anchovies, crab and squid.
Yellowfin are actual tuna found in all three oceans of the world. These fish swim with other tuna species, and they associate with dolphins. As of August 2014, the longest yellowfin recorded was 7.8 feet and was caught in Florida. The heaviest yellowfin recorded was 441 pounds. The largest school of yellowfin is found in the eastern Pacific Ocean from Chile to California. Yellowfin are a top predator in the ocean food chain.Learn More
Koi fish are really a type of carp. The term "mongrel koi" refers to koi fish which have somehow become inbred with other types of fish. Koi fish are popular for their colors and sleek appearance in fish ponds.Full Answer >
Cod's roe refers to either the ripe egg mass in the ovaries of the fish or the fish eggs themselves. The adult female cod lays an average of four to six million tiny eggs with each spawning. They can be eaten raw or cooked.Full Answer >
Fish jump in order to move through their habitat, catch flying prey and escape predators. Leaping allows them to travel upstream and avoid obstacles. Fish caught on a hook by fisherman often jump out of the water in an effort to dislodge it. Aquarium fish jump out of their tanks due to fear, to escape dirty water or to amuse themselves.Full Answer >
Fish survive when a lake freezes by receding to the lower depths of the lake where the water is not frozen. In the winter, the water still holds a sufficient supply of oxygen and food for active fish.Full Answer >