The basking shark is the second largest fish in
the world, a gentle giant of the oceans and
secondonly to another filter feeder, the whale shark.
The basking shark is the second largest fish in the world, second only to another filter feeder, the whale shark. This animal can attain lengths of at least 10 meters (33 feet), but the average size is 7-9 meters. They can weigh up to 4 tons. The shape of its snout is conical and the gill slits extend around the top and bottom of its head. Associated with the gills are structures called gill rakers. These gill rakers are dark and bristle like and are used to catch plankton as water filters through the mouth and over the gills. The basking shark is usually grayish-brown in colour and often seems to have a mottled appearance. The caudal (tail) fin has a strong lateral keel and a crescent shape. The teeth in the basking shark are very small and numerous and often number one hundred per row. The teeth themselves have a single conical cusp, are curved backwards and are the same on both the upper and lower jaws.
Basking sharks are a migrating species and are believed to overwinter in deep waters. They may occur in either small schools or alone. Small schools in the Bay of Fundy have been seen swimming nose to tail in circles in what may be a form of mating behavior. Basking sharks are not aggressive and generally harmless to people. The number of basking sharks is unknown, but may be decreasing since the basking shark is hunted for its meat, fins and oil.
Historically, the basking shark has been a staple of fisheries because of its slow swimming speed, unaggressive nature and previously abundant numbers. Commercially it was put to many uses: the flesh for food and fishmeal, the hide for leather, and its large liver (which has a high squalene content) for oil.[4] It is currently fished mainly for its fins (for shark fin soup). Parts (such as cartilage) are also used in traditional Chinese medicine and as an aphrodisiac in Japan, further adding to demand.
As a result of rapidly declining numbers, the basking shark has been protected and trade in its products restricted in many countries. It is fully protected in the UK, Ireland, Malta, Florida and US Gulf and Atlantic waters. Targeted fishing for basking sharks is illegal in New Zealand.
Once considered a nuisance along the Canadian Pacific coast, basking sharks were the target of a government eradication program there from 1945 to 1970. As of 2008[update], efforts are underway to determine if any sharks still live in the area and monitor their potential recovery.[12]
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