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Transcript of BARRACUDA PROJECT
They become juveniles once they reach about half an inch in length. This is when they start to look like a miniature version of adults. During this time they live in and eat vegetation in weedy coastal areas for their first year of life.
When they grow larger than a few inches, they become adults and go to live in deeper waters with coral reefs. They feed on other fish. They live for up to 14 years. Anatomy Great barracudas have gills made of many tiny blood vessels and capillaries. They take oxygen from the water, allowing the fish to breathe in water. When a barracuda swallows, the prey is carried to the pharynx and esophagus. It then travels to the stomach, where it is digested. It passes through the spiral intestines before exiting as waste out the anus. Reproduction Reproduction is sexual - involving two parents. Video Adaptations (Fins) The great barracuda has two dorsal fins. The fins are located on top of its body. One is near the head, the other is in front of the tail. Its caudal fin is forked and curls outward in the center of each fork. It is the large fin at the end of the tail. By Michael Requejo The barracudas reproduce when they reach sexual maturity. For males this takes about two years. For females this takes about four years. It is believed that barracuda are spawned between April and September. Females group together and release many thousands of eggs. The fertilized eggs remain floating around until they hatch. The newborns are not raised by their parents. It has a pair of pectoral fins on the sides of the body, located below the front dorsal fin. It has an anal fin located on the bottom of its body, in front of the tail. It has a pair of pelvic fins on the bottom of its body located underneath the pectoral fins. The barracuda's fins are connected to the skeleton by bony spines and flexible rays. These fins make the barracuda very hydrodynamic. This helps the fish easily ambush prey at high speeds, making them an efficient predator. Digestive System The brain of the barracuda has five parts. The lateral side of the barracuda's body contains many sensory and sensitive nerves. These nerves help the barracuda remain oriented in dark water, sensing the plants, rocks and other fish that are nearby. Anatomy 2 The barracuda's skeleton is made of cartilage and has a long spine. An adult great barracuda usually is 2-3 feet long, and weighs around 10-20 pounds. However, some can grow to be 5-6 feet long and weigh up to 100 pounds. The great barracuda can be dark green, blue or grey above chalky-white below. Sometimes, a row of darker cross-bars or black spots occurs on each side. The fins may be yellowish or dark. The great barracuda has a slender, streamlined body that is round in the mid-section. The top of the head between the eyes is nearly flat and the mouth is large, containing many large fang-like teeth and a projecting lower jaw. Adaptations 2 One adaptation of the barracuda is its huge sets of teeth. These help it literally tear its prey apart. Another is the barracuda's great sense of smell and sight. This adds to the fish's skill at being a predator. Another is one of their feeding methods. The barracuda lies in wait until prey comes near. They then ambush their prey before it has time to react. citations :) http://sea.sheddaquarium.org/sea/fact_sheets.asp?id=104