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The scalloped hammerhead shark (Sphyrna lewini), a critically endangered species with a decreasing global population, is characterised by its occurrence in large schools. Such schools are still observed today in the Pacific Ocean, but this is generally not the case in the Atlantic Ocean, and in the Cayman Islands not since the 1970s. Here we report...
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... from the shallow-water BRUVS surveys undertaken between 05 Nov 2009 and 23 Nov 2018 off Grand and Little Cayman, representing 2164.5h of seabed time, included a total of eight S. mokarran but no S. lewini (Table 1). Observations of S. lewini on deep-water BRUVS were made on 6 occasions, with a total of 18 individuals recorded. ...Context 2
... longline surveys (Table 1) were undertaken between 05 Nov 2009 and 12 Dec 2016 off Grand and Little Cayman, with a total soak time of 875h, resulting in two S. mokarran briefly captured, measured and released (in addition to sharks from other genera). ...Context 3
... from REEF (Table 1) indicated that in 10,807 surveys over 11,376 hours were conducted in the three Cayman Islands between 1993 and the end of March 2023 (29 years), resulting in two S. lewini and four S. mokarran sightings ( Figure 2). The local Sharklogger Network recorded observation of Sphyrna sp. in all three Cayman Islands in (Kohler, 2022. ...Context 4
... were observed largely below 40m off the coastal wall and were relatively abundant. Analyses showed that divers reported seeing 0.004 sharks per dive, with 66% of the individuals observed considered mature (n=24,442 dives) ( Table 1). ...Context 5
... the social media platforms (see Section 2.5) analysed (Table 1), nine S. lewini, 53 S. mokarran and 20 undetermined Sphyrna sp. were reported between the end of 2009 and mid 2023 ( Figure 2). All reports were of single sharks, except for one sighting of two S. mokarran swimming together. ...Similar publications
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Citations
... There have been recent research efforts to explore the biodiversity in the deep waters around the Cayman Islands Gallagher et al., 2023;Gore et al., 2024). However, with potential for hosting a range of unique species and high rates of biodiversity, more studies need to be undertaken to systematically assess and quantify the biodiversity of the deep ocean throughout the territorial waters of the Cayman Islands. ...
The roughskin dogfish Centroscymnus owstonii, a deep‐sea shark, has a patchy global distribution, with most knowledge stemming from incidentally captured specimens. Using a deep‐sea remote lander video system, we observed multiple C. owstonii individuals alive on the footage at 1054 m off Little Cayman, Cayman Islands, Western Atlantic Ocean, marking, to our knowledge, the first record of the species in the Greater Antilles, central Caribbean Sea, while also adding a new species locality record for the Cayman Islands. This study expands our knowledge of the distribution of the roughskin dogfish in the region, and highlights the utility of video lander systems for enhancing and expanding our understanding of the biology and diversity of deep‐sea sharks.
