4 Unique Facts About Sharks That Every Fossil Enthusiast Should Know

1. 4 Unique Facts About Sharks That Every Fossil Enthusiast Should Know If you are a fossil enthusiast and love digging facts about different types of fossils, this post is for you. We are going to talk about some of the most distinctive yet incredible physical features that make the shark species unique from other aquatic animals. Let’s get started. The fossils of sharks date back to about 450 million years ago. They have been dwelling in the aquatic world for millions of years. You would be thrilled to know that many shark species are known today to humans only emerged 200 million years ago. This means that sharks were one of those prehistoric creatures that survived the mass extinction that put an end to the dinosaur era. Here are a few more mind-blowing features that make the sharks different from other aquatic animals. 1. Cartilaginous skeleton

2. The cartilaginous skeletons are one of the major reasons why “where can I buy shark teeth” is the most common search on the Internet by fossil collectors. Unlike other fish that come with bony skeletons, the skeleton of sharks is made of cartilage. Although cartilage is a muscular connective tissue helping sharks to swim without much effort and energy, it cannot be fossilized like bones. This is one of the major reasons why early records of shark fossils turned out poor. Even the paleontologists have only the shark teeth and today’s shark species to understand how exactly the early sharks looked like. 2. Dermal denticles Being a fossil enthusiast, you might already know that sharks are known for their strong jaws and countless teeth. However, this is not the only feature that makes them different from other fish. Dermal denticles are the small sharp-teeth looking scales found on the skin of sharks, which also helps them hunt for their prey by reducing the drag underwater. 3. Gill slits Everyone knows that all kinds of fish, including sharks, have gills for respiration. however, unlike fishes with only a single opening on each side of their body, sharks have around seven gill slits. Some of these huge creatures get oxygen to the gills using ram ventilation. They swim continuously and keep their mouth open to enable water to flow through. On the other hand, some bottom-dweller sharks have openings, also known as spiracles, behind their eyes that help pull the water in and flow using the gills. 4. Oily liver

3. Sharks stay buoyant with their oily liver which makes up twenty-five percent of the body weight. The liver of these huge creatures stores fats to help them migrate long distances. Irrespective of the large liver filled with oil, sharks can easily float. Now you know some of the most incredible facts about sharks and their unique features. So while looking for “where can I buy shark teeth,” make sure to buy from an authentic dealer. Author’s bio-the author is a blogger. This article is about shark facts. Source - https://sites.google.com/view/buriedtreasurefossils-com/home