The document describes various sea creatures such as sea horses, dolphins, coral, starfish, marine turtles, sharks, crabs, and clownfish providing 1-2 paragraphs on each species describing their physical characteristics and features. It briefly outlines that sea horses are small with tails, dolphins are related to whales, coral provides shelter for fish and doesn't have mobility, and starfish have 5 arms while sharks are cartilaginous fish.