Quick rules for flying with fish in carry-on and checked baggage. Verdicts and conditions across the major aviation regions below.
TSA allows live fish in carry-on in a clear, sealed, leak-proof plastic container (subject to liquid screening — declare at security). NEVER in checked baggage (temperature and pressure changes are fatal). Airlines vary widely — Southwest and Alaska are most permissive; most others require advance approval or refuse outright. International: many countries restrict live fish imports.