So, this adaption that’s so integral to their survival, also makes them vulnerable to human exploitation. Unfortunately, there is a huge demand for shark liver oil, which is used in cosmetics. Their huge oily liver helps them to maintain buoyancy in the water, along with their fins and lightweight cartilaginous skeleton. Incredibly, a shark’s liver can make up to 25% of their total body weight! In mammals this is only 5%. They are able to spend lots of time lazing around by sucking water into their mouth and squeezing it over their gills. Yet, some less active sharks (such as shysharks and Zebra Sharks) have got around this problem. As water passes over the gills, oxygen is absorbed into tiny blood vessels and transported around the body. As they swim water is driven through their mouth and out over their gills – a process known as ‘ram-ventilation’. To breathe many shark species have to remain in constant forward motion. Puffadder Shyshark – photograph by Andy Murch – Sadly, high demand for shark fins has contributed to the decline of many shark species. Whereas, slower moving sharks, such as the Broadnose Sevengill Shark, have longer thinner tails. Faster sharks, such as the Shortfin Mako, tend to have shorter half moon shaped tails. The size and shape of a shark’s fins and tail can vary greatly. The shark’s pectoral fins are used to steer and lift themselves in the water and their tails are used to propel themselves forward. Usually they’ll also have a smaller dorsal fin further back towards their tail. Sharks have a large dorsal fin which provides balance. Finsįins provide balance and stability in the water. The teeth may change with age as the diet of a pup may differ to that of an adult. Inspired by Association of Zoos and Aquariums-assisted conservation successes like the reintroduction of the scimitar-horned oryx and the California condor, Georgia. Flat crushing teeth are perfect for eating shellfish, pointed teeth for gripping fish and sharp serrated teeth for larger prey, such as seals. This bold idea was first proposed by Conservation International over five years ago, when their Asia-Pacific team developed a concept plan for recovering zebra sharks in Indonesia. Sharks replace their teeth approximately every 2 weeks and some species, like the Great White Shark, can lose 60,000 teeth in their lifetime! We can tell what a shark eats by the shape of its teeth. Ensuring they always have a full set of razor- sharp pearly whites. And their tails are used to propel themselves forward. Their pectoral fins are used to steer and lift themselves in the water. Usually theyll also have a smaller dorsal fin further back towards their tail.
![zebra shark diagram zebra shark diagram](https://i.pinimg.com/originals/17/ac/ca/17accaeb2c9d9462c48130228e77531e.jpg)
They have many rows of teeth which are constantly being replaced. FINS Fins provide balance and stability in the water. In some parts of the world, this species is called a leopard shark because. Sharks defend themselves immediately after birth, so they are born fully equipped. A zebra shark (Stegostoma tigrinum) swims over the reef in Vaavu Atoll, Maldives. Shark teeth are made of enamel, are strong and appear in huge numbers in the fossil record.
![zebra shark diagram zebra shark diagram](https://www.coraya-divers.com/en/wp-content/uploads/sites/2/2016/06/Zebra-Shark.jpg)
![zebra shark diagram zebra shark diagram](https://storybookstorage.s3.amazonaws.com/items/images/000/344/883/original/20160418-14874-139y0e7.jpg)
Buffalo house name is Barn, Byre, Pasture, Stable.Bee house name is aviary, beehive, hive.Beaver house name is beavery, lodge, burrow.Ant house name is formicary, hive, nest.They use their homes/shelters for their purpose. They have a family to feed for their survival and feel safe from external threats, lay eggs, raise their young, and seek protection from natural consequences such as cold, rain, and other harsh weather conditions. In the same way, animals and birds have places where they live, sleep and feel comfortable.