Round Pufferfish Beside a Pearl Oyster
A round, inflated pufferfish floats beside an open oyster containing a single pearl.
A4 format (portrait), black outlines on a white background · for home and classroom use
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A pufferfish beside a pearl oyster
This page shows a spiky pufferfish with its body expanded into a rounded shape. Beside it rests a large open oyster, revealing a pearl inside the shell. The inflated fish, its many spines, and the oyster’s curved halves make up the underwater subject without requiring any additional animals or objects.
Unusual facts about pufferfish and pearls
A pufferfish inflates by quickly taking water into its elastic stomach, making its body harder for a predator to swallow. Its spines become more prominent as the body expands. A pearl can begin forming when the soft tissue of a mollusk coats an irritant with repeated layers of nacre, the same material that lines many shells.
Natural colors of the pufferfish and oyster
- Pufferfish body: often tan, yellow, olive, brown, gray, or pale cream
- Pufferfish markings: may be black, dark brown, white, or muted green
- Pufferfish spines: usually match the body or appear slightly darker at the tips
- Oyster shell: commonly gray, brown, cream, white, or greenish on the outside
- Pearl and inner shell: typically white, cream, pale pink, silver, or softly iridescent