Our Winter 2023 magazine is all about the life-changing effect that the underwater realm can have on us - and not always for the better. In this issue, photographer and guide Todd Thimios recounts how a documentary seen as a child fuelled a life-long drive to film orcas in the wild, together with some of the most stunning wild orca shots ever taken when he finally succeeded. Douglas David Seifert provides more of his own magnificent camerawork as he reports on how life is rebounding around the Caribbean island of Mustique thanks to a Canadian rock star; we feature an extact from Erich Hoyt's Planktonia, The Nightly Migration of the World’s Smallest Creatures together with some beautiful blackwater macro photography; and Mark 'Crowley' Russell talks to a dive instructor wrongfully prosecuted for the death of his student - a death that may have been preventable, had the global dive community woken up earlier to the dangers of Immersion Pulmonary Oedema. All this plus an interview with the women behind up-and-coming luxury dive tour operator, Reefscape Travel, the curio that is the shame-faced crab and some of this winter's best Featured Photographers