Bahlaouan, B. (2025) “Into the Great Wide Ocean: Life in the Least Known Habitat on Earth, by Sönke Johnsen, Princeton University Press, 2024, 248 pp., $24.95/£20.00 (hardback), ISBN: 978-0-6911-8174-5”, Natural Built Social Environment Health, 1(2), pp. 175–177. doi: 10.63095/NBSEH.25.889273.