Other adaptations include sheaths that are made of a gel-like substance and ion replacement. Q. Catfish have dorsal fin spines, which help defend against predators, and caudal fins, which help to propel the fish through the water. 3 Minute Read Clown fish live in anemones and plants and they are poisonous to surrounding fish. Adaptation is an evolutionary process whereby an organism becomes increasingly well suited to living in a particular habitat. All of these groups have members that live in and around the water today, so all four answers are correct. Amphibians are ectothermic, tetrapod vertebrates of the class Amphibia.All living amphibians belong to the group Lissamphibia.They inhabit a wide variety of habitats, with most species living within terrestrial, fossorial, arboreal or freshwater aquatic ecosystems.Thus amphibians typically start out as larvae living in water, but some species have developed behavioural adaptations to bypass this. Some freshwater fish have developed the ability to climb trees, squirt water at insects, breathe air and stay out of water for long periods of time. A specific adaptation would be the clown fish. In this section, we're going to introduce you to a variety of aquatic reptiles and some of the adaptations they have to living in water. But fishes live in a solution of water that resembles the fluids in their bodies. Depending on where they live, fishes have complex ways of dealing with excess salt and water accumulation in their bodies. Many have adaptations that help them swim fast such as a lunate tail or a narrow caudal peduncle. The typical examples are whales. Structural adaptation relates to the organism’s physical features. Hope this helps 3. The reptiles came about as a novel group of terrestrial animals from the amphibians. All benthic fishes lack pnm bladders and rest on the bottom, sometimes like tripod fishes … They absorb O 2 that is dissolved in the water. Despite the thousands of different species, all fish share common evolutionary adaptations that help them thrive in their watery domain. As the water is pushed out of fish's body (through gills), the dissolved oxygen mixes with the blood. In cold winter months, lakes and rivers freeze over forming ice. Reptiles. After listing the organism’s adaptations, say, “We made a good list of adaptations that these organisms have. But some seabirds also come standard with more exotic features like airbags, night vision and a self-defense system that’s both disgusting and potentially deadly. Next, show students a picture of a fish (S-4-2-1_Fish and Frog.docx) or show them a real fish if you have an aquarium in your classroom. Researchers at the Friedrich Miescher Laboratory are studying stickleback fish to unravel the genetic changes which allow organisms to adapt and speciate in new environments. 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