Final answer:
Examples of laterally flattened fish include the stingray, which camouflages in the sandy ocean floor, and the spotted ratfish with a unique spotted appearance and a rat-like tail.
Step-by-step explanation:
Two examples of laterally flattened fish are the stingray and the spotted ratfish. These species belong to the group of cartilaginous fish, which are characterized by their cartilage-based skeletal structure rather than bones. Stingrays are well known for their flattened bodies which allow them to blend into the sandy ocean floor, providing camouflage and protection from predators.
The spotted ratfish (Figure 29.15b), on the other hand, has a distinct appearance with spots and rat-like tail.