Sharks are a group of elasmobranch fish characterized by a cartilaginous skeleton, five to seven gill slits on the sides of the head, and pectoral fins that are not fused to the head. Modern sharks are classified within the clade Selachimorpha[1] (or Selachii) and are the sister group to the Batoidea (rays and kin).

2021年12月7日 · List of different types of sharks with pictures & facts. Discover amazing shark species, where found, lifestyle, conservation, classification.

2023年4月11日 · Again, talking about their size and shape, Blue sharks are medium-sized sharks found in temperate and tropical waters around the world. They are typically between 1.8 to 3.3 meters (6-10.8 feet) long and weigh around 120-400 lb (54-181 kg) on average.

Find Shark Shape stock images in HD and millions of other royalty-free stock photos, illustrations and vectors in the Shutterstock collection. Thousands of new, high-quality pictures added every day.

Shark anatomy is highly developed as a result of over 450 million years of evolution and has made sharks an incredibly successful species. Here is an overview of the unique anatomical characteristics that make sharks unique.

Most sharks have a body shape that is at least somewhat fusiform, or torpedo-like. As they swim, sharks use continuous lateral (side-to-side) undulations of the body. The pectoral fins on either side of the body are positioned and shaped to help the shark maneuver in all planes, often at “lightning” speed.

Parts of the shark. Learn the anatomy of the shark and discover the parts of its head, body and tail, as well as the most important internal organs.

Body Shape. Sharks typically have a fusiform body (rounded and tapered at both ends). This shape reduces drag and requires a minimum amount of energy to swim. Wobbegong sharks (Family Orectolobidae) and angelsharks (Family Squatinidae) have a flatter appearance than most sharks. Batoids are flattened, with a ventral mouth and gill openings.

Discover the distinct body shapes of sharks and how these forms influence their behavior, habitats, and hunting styles. Learn about fusiform, elongated, and other shark body types.

The size and shape of a shark’s fins and tail can vary greatly. Faster sharks (such as the Shortfin Mako) tend to have shorter crescent shaped tails. Whereas slower moving sharks (such as the Bluntnose Sixgill Shark) have longer thinner tails. Sadly, high demand for shark fins has contributed to the decline of many shark species.