Scientists admit that there are still many "mysteries" surrounding the movements of humpback whales in Irish coastal waters.
It follows the publication of new research by the Irish Whale and Dolphin Group (IWDG) who worked with scientists in the US, Iceland, Norway and the Netherlands.
It compared 28 humpback whales photo-identified in Irish waters to a catalogue of over 8,000 animals recorded elsewhere throughout the North Atlantic.
The IWDG says it is "staggered" to discover no matches were found between whales documented in Ireland and those on the known breeding grounds in the West Indies and Cape Verde.
You can discover more about the research in this interactive video by RTÉs Philip Bromwell.
By touching or clicking graphics on screen, you will be able to explore more compelling content without leaving the video.
The interactivity works best on modern browsers such as Chrome, Safari, Firefox and IE11 on desktop and tablet.
The format is compatible with most Android smartphones but will play without interactivity on iPhones.
Tell us what you think about this new storytelling format, powered by TouchCast, by emailing email@example.com.