Ask a shark, ray, skate, or chimaera question. Get sources, limits, and a safer next step.
Use this as a source-backed map of what to read and what remains uncertain. Evidence: well supported. The answer can lean on reviewed DOI-backed evidence, while still naming uncertainty. 5 reviewed source records and 4 claim notes are attached in Sources and checks. Literature map: Source cluster: start with the DOI-backed or official records above. Evidence gap: identify what the reviewed sources do not settle yet. Next search: ask for a narrower species, region, time period, or method if you need a deeper map.
Use for global oceanic trend framing, not for local abundance claims without regional sources.