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Protection-requins » Entries tagged with "basking shark"

Le 2ème plus gros poisson du monde : le requin pèlerin / The 2nd largest fish in the world, the basking shark

Le requin pèlerin (Cetorhinus maximus) peut atteindre 12 mètres (taille maximale, plus communément 8-9m) et peser jusqu’à 7 tonnes (le poids de 2 éléphants adultes). Pourtant, le second plus gros poisson du monde est inoffensif. The basking shark, scientific name Cetorhinus maximus, Manx name Gobbag vooar (big mouth) is the second largest fish in the world. It is named basking shark because of its habit of ‘basking’ at the surface of the water. Historical accounts give maximum sizes for basking sharks of 40-46 ft (12-13.72 m). It seems reasonable to estimate a weight of about 7 tonnes for an 8.7m basking shark. This is about the weight of two fully grown elephants. Despite its huge size it is completely harmless to man. Distribution et photo-identification / Geographical distribution and photo-identification On le trouve dans toutes les mers tempérées du … Read entire article »

Filed under: anatomie, physiologie, géographie, Le saviez-vous ? / Do you know that..?

Do you know that…

Tiger sharks (Galeocerdo cuvier): – have teeth shaped like those found on a circular saw? – can travel thousands of miles between continents ? – can have between 10 & 82 pups ? – require bays or estuaries as nursery aeras ? – can take up to 18 years to reach maturity ?   Basking sharks (Cetorhinus maximus) : – are long distance travellers ? – filter around 2000 tons of water a day? – can weight up to  1800 kgs ? – are the second largest fish in the sea ? – swim by moving their entire body from side to side, not just their tail ? – spend a lot of their time at the surface, hence their nickname (confusingly) is « sunfish » ? – have hundreds of tiny ineffective teeth ?   Tresher sharks (Alopias sp.): – have tails so large they account for more … Read entire article »

Filed under: anatomie, physiologie, Le saviez-vous ? / Do you know that..?