Parts And Characteristics Of A Fish

Fish breathe through gills, which are specialized organs that extract oxygen from water. Gills are located on the sides of a fish's head and consist of thin filaments that are rich in blood vessels. As water passes over the gills, oxygen diffuses from the water into the fish's bloodstream, while carbon dioxide is released. This process allows fish to extract oxygen from their aquatic environment and is essential for their survival underwater. Therefore, the correct answer is true.

The lateral line is a sensory system found in fish that helps them detect movement and vibrations in the water. It consists of a series of small sensory organs along the sides of the fish's body. When fish swim in a group, such as herring, the lateral line allows them to sense the movements of their fellow fish and avoid colliding with them. This helps maintain the cohesion and coordination of the group.

Cartilaginous fish are a group of fish that have skeletons made of cartilage instead of bone. Examples of cartilaginous fish include sharks, rays, and skates. These fish are known to be carnivores, meaning they primarily feed on other animals. Their diet consists mainly of smaller fish, crustaceans, and other marine organisms. They have sharp, pointed teeth and powerful jaws that allow them to catch and consume their prey effectively. Therefore, it can be concluded that cartilaginous fish are carnivores.