An unusual deep-sea shapeSourced
A tiny worm with a very memorable nickname
Chaetopterus pugaporcinus has a rounded, swollen middle. Its appearance earned it nicknames including pigbutt worm. Observations show these small animals drifting in deep water rather than crawling along the seabed.
Deep-sea naming can be surprisingly blunt.
Summary / translation: Unbubly · CC BY-SA 4.0
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Chaetopterus pugaporcinus · Wikimedia contributors
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Reviewed: 2026-10-09