https://nautiluslive.org/video/2025/06/06/spiky-sea-urchin-ahyi-seamount
Spiky Sea Urchin on Ahyi Seamount | Nautilus Live
Jun 6, 2025 - While exploring Ahyi Seamount (an uncharacteristically shallow dive for ROV Hercules), the team spotted this Diadema setosum urchin nestled in an algae bed...
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