Via a remote submersible camera, the researchers found more than a thousand fish nests – carefully cleared patches in the plankton detritus at the bottom of the ocean. (Weddell Sea Expedition 2019)It wasn't just the discovery of the nests that was remarkable – it was how they were arranged. This structured ecosystem is being presented as further evidence in the case for making this part of the Weddell Sea a Marine Protected Area. While the wreck wasn't found this time (it was finally discovered in 2022), the fish nests were everywhere. Unlike many fish colony nests, these nests hadn't been put in warmer waters, suggesting temperature wasn't the reason for the clusters.