Trending questions. I was just wondering if some sharks have a placenta or some connection between the mother and the developing young. Get answers by asking now. See how great a forest a little fire kindles! Answer Save. Some sharks need to hunt in … Sharks belong to the elasmobranch group of fish that have lighter, more flexible cartilage in their skeleton, instead of bone. Shark eggs are telolecithal and this concentration of yolk means they represent an attractive source of fats and protein to potential predators. ... yes they do. If they stop swimming, no more water flow means no more oxygen, so breathing stops. This has caused many species of sharks to become vulnerable to endangerment. However some bottom-dwelling sharks have adaptations for breathing even while they are still on the sea floor. Scientists have found out the true size of the prehistoric giant shark, Megalodon. 6 And the tongue is a fire, a world of [unrighteousness]iniquity. Yes, thankfully. Many shark species have brains as complex as mammals, which enables them to process a wide range of senses. Still have questions? Shark Senses. True sharks are classified in the superorder selachimorpha and there are more than 440 species alive today. 5. A new species of shark, skate or ray is identified approximately every two weeks. One of … Sharks are divided into two groups: those that lay eggs (oviparous), and those that give live birth (viviparous). We all need to learn to control it, the tongue. - Credit: Marc Baldwin. 0 0. Yes, some sharks need to swim continuously to stay alive. Megalodon young may have done the same. Removed comment. Join Yahoo Answers and get 100 points today. Some sharks also have a mechanism on their caudal fins called a horizontal keel, which reduces turbulence and allows them to swim faster. Do sharks have bones? It seems that these molluscs use their drill-like radula (tongue) to bore into the eggcase and feed on the energy-rich yolk. Do sharks have placentas? P. Instead have a yes or no answer ready for any potential combination of offers from the sharks… It's integral to wildlife conservation, providing the bedrock for our understanding of sharks. Once it is out there, is no taking it back. 1 Corinthians 12:9 to another faith by the same Spirit, to another gifts of healing by that one Spirit, 1 Corinthians 12:10 to another the working of miracles, to another prophecy, to another distinguishing between spirits, to another speaking in various tongues, and to still another the interpretation of tongues. Join. Sharks obtain oxygen for breathing from the water that flows over their gills. Ask question + 100. Sharks are fascinating creatures, especially when it comes to discussing their reproduction and development. James 3:5-7 (NKJV) 5 Even so the tongue is a little member and boasts great things. The tongue is amazing when it comes to running. Known as a mermaid’s purse, the egg sac of oviparous sharks … Do sharks have any predators/threats? Many young sharks spend their first few months or years in the safety of a nursery until they’ve grown big enough to venture out into the open sea. What the large upper lobe does for the shark is to ensure a combination of being able to cruise at slow speeds, observing their surrounds and scouting for prey, and suddenly to burst into a powerful surge when in pursuit of darting prey. Sharks are apex predators that have no natural enemies; however, humans are predators of sharks, with an estimated 30 to 100 million sharks are killed every year by fisherman. 0. 3 Answers. So don't leave the tank and let your sharks collude behind your back! Taxonomy is a field of science that involves classifying and naming species. ... Do sharks have tongues? No. Eggs are telolecithal and this concentration of yolk means they represent an attractive of! 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