Police say they have given up hope of finding a missing baby boy alive after a family tragedy in South Australia. Multiple outlets report that a search has been ongoing in waters off the state amid difficult conditions, described as treacherous seas. The search effort continues despite the challenging marine environment, which has limited the chances of locating the child. Authorities have not indicated any alternative outcomes beyond the statement that hope of survival is no longer expected. The incident follows a family tragedy, prompting an urgent response and an extended search operation focused on locating the baby in the surrounding sea area. Reports agree on the central development: police are treating the missing child’s case as one where survival is unlikely, while search activity remains part of the response. Details beyond the search conditions and the police update are not provided in the supplied accounts.