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Related Experiment Video

Updated: Jul 4, 2026

Behavioral Tracking and Neuromast Imaging of Mexican Cavefish

Behavioral Tracking and Neuromast Imaging of Mexican Cavefish

Published on: April 6, 2019

Transatlantic migration and deep mid-ocean diving by basking shark.

Mauvis A Gore¹, David Rowat, Jackie Hall

¹University Marine Biological Station, Millport, Isle of Cumbrae, UK. mauvisgore@netscape.net

Biology Letters

|May 31, 2008

Summary

Basking sharks (Cetorhinus maximus) may migrate across oceans, challenging previous assumptions of isolated populations. Tracking data reveals long-distance North Atlantic movements and deep-water dives, suggesting broader connectivity and habitat use for this large fish.

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Methods for Image-based Surveys of Benthic Macroinvertebrates and Their Habitat Exemplified by the Drop Camera Survey for the Atlantic Sea Scallop

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Published on: July 2, 2018

Area of Science:

Marine Biology
Ichthyology
Animal Migration

Background:

Basking sharks (Cetorhinus maximus), the second-largest fish species, were thought to inhabit discrete, non-migratory populations.
Their known distribution was limited to temperate continental shelf regions, with no prior evidence of transoceanic or interhemispheric migration.

Purpose of the Study:

To investigate the migratory behavior and population connectivity of basking sharks.
To determine if basking sharks undertake long-distance movements across oceans or between hemispheres.

Main Methods:

Satellite tagging of two basking sharks (Cetorhinus maximus) off the British Isles.
Tracking the movements and recording the diving behavior of tagged individuals.

Main Results:

One tagged basking shark traveled 9589 km across the North Atlantic, from the British Isles to Newfoundland, Canada.
The same shark reached a record depth of 1264 meters, indicating utilization of deep-water habitats.
This provides the first evidence linking European and North American basking shark populations.

Conclusions:

Basking sharks exhibit transoceanic migratory behavior, connecting previously assumed separate populations.
These large fish utilize deep-water environments beyond the continental shelf.
The findings necessitate a re-evaluation of basking shark population structure and conservation strategies.