Shield tooth shark
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Shield tooth shark ( Odontaspis ferox ) |
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| Odontaspis ferox | ||||||||||||
| ( Risso , 1810) |
The shield tooth shark ( Odontaspis ferox ), also called small-toothed sand tiger shark , is a species from the genus of small-toothed sand tiger sharks ( Odontaspis ) within the family of sand sharks (Odontaspididae).
description
Shield-toothed sharks have the typical streamlined shape of pelagic sharks. They are a maximum of 4.10 meters long. The top is gray-brown in color. It has a metallic shimmer and can also have small, red spots. The underside is light. The pectoral fins are short and wide. The second dorsal fin is relatively large. The tail stalk is short. The anal fin is about the same size as the second dorsal fin. The caudal fin has a large upper part and a small lower part. All five gill slits lie in front of the pectoral fin.
The teeth of both jaws have a long, central point and several small side points. The teeth of the lower jaw are visible even when the mouth is closed.
distribution
The shield tooth shark lives around the world on the continental shelf in the Atlantic , Pacific , Indian Ocean and the entire Mediterranean at depths of 10 to 530 meters. In the Canary Islands, the sharks have also been spotted in significantly shallower water, and they were pregnant females, which suggests that the sharks visit the waters to give birth to their young.
Way of life
The sharks live individually or in small schools. They are nocturnal and swim very slowly. Bonefish , crustaceans and cephalopods make up their diet. Shield-toothed sharks are viviparous. The largest boy eats younger eggs and embryos in the uterus. You will have two cubs per litter, one per uterus , which are already three feet long at birth.
literature
- Alessandro de Maddalena, Harald Bänsch: Sharks in the Mediterranean , Franckh-Kosmos Verlag, Stuttgart 2005, ISBN 3-440-10458-3 .
Individual evidence
- ^ Andreas Westphal: Small tooth sand tiger shark - Odontaspis ferox. In: Canarian Sea. Canarian Sea, April 17, 2014, archived from the original ; Retrieved July 17, 2014 .
Web links
- Shield tooth shark on Fishbase.org (English)
- Odontaspis ferox inthe IUCN Red List of Threatened Species 2013.1. Posted by: Pollard, D., Gordon, I., Williams, S., Flaherty, A., Fergusson, IK, Dicken, M. & Graham, K., 2007. Retrieved November 6, 2013.