Final answer:
Dorsalventrally flattened fish, such as stingrays, are commonly found at the bottom of the ocean where their body shape helps in camouflage and hunting.
Step-by-step explanation:
Dorsalventrally flattened fish, such as stingrays and some types of sharks, are often found at the bottom of the ocean where they blend into the sandy sea floor. These cartilaginous fish belong to the class Chondrichthyes, which also includes sharks that may live on the ocean bottom or in the water column, preying on other fish and aquatic mammals or consuming plankton. The body shape of these fish, such as the stingray with its broad, flat body, assists them in hunting and camouflage on the ocean floor, where the sand or mud environment provides cover from predators and allows ambush of prey.