Look up sea urchin in Wiktionary, the free dictionary.
A sea urchin is a spiny marine echinoderm.
Sea Urchin may also refer to:
- The Sea Urchin (1913 film)
- The Sea Urchin (1926 film)
- The Sea Urchins, an English indie pop band
- Sea Urchins, a 1980–84 New Zealand television series