Uploaded June 2021 | Updated September 2026, 2 hours ago

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How does the abundance of animal life change with depth on Caribbean mesophotic reefs??
Surprisingly, this is a controversial scientific topic, and this video allows the viewer to evaluate the "sponge increase hypothesis" for themselves, by looking at video captured at 20 m intervals from 160 to 40 m on mesophotic reefs in Puerto Rico and Roatan.