In this illustration, a diver wearing a full wetsuit and scuba gear glides through the water. You can see their mask, snorkel, and oxygen tank clearly as they swim with large flippers. Small bubbles float upward toward the surface while curious fish swim through the scene. In the background, an old shipwreck leans against the seabed, accompanied by a heavy anchor and some underwater debris. Near the ship, a mysterious treasure chest sits waiting to be opened, surrounded by beautiful coral formations.

Use bright yellows and oranges for the fish to make them pop against the cooler tones of the water. For the shipwreck and anchor, shades of brown and gray with hints of rusty orange can create a weathered, aged look. The treasure chest looks fantastic with golden tones and silver accents for the lock and hinges. You might try using light blue or teal for the water, leaving small white spots on the bubbles to give them a shiny, reflective appearance. Adding some darker greens and pinks to the coral will help the ocean floor look vibrant and full of life.