Step 1 : Introduction to the question "How many stomachs does a dolphin have?"
...Dolphins are not fish; they are mammals. They evolved over millions of years to live in the sea. They use their tail in an up and down motion to swim, which is the opposite of fish. A fish wiggles its take left and right. Unlike land mammals, dolphins have no hair. They have two stomachs, one for digesting their food and the other for storing food. A dolphin's skin is quite delicate, and they sustain injury by merely brushing rough surfaces. Dolphins steer with their flippers rather than their tail, which provides the force behind their motion. Source: WOU.edu
