Sometimes there would be a "lobster exchange", tropical spiny "goosters" for Maine Atlantic lobsters. They had sealable waterproof cylindrical containers that would fit in sonobuoy launch tubes and could hold enough seawater to keep several lobsters alive for the duration. There were several launch tubes aboard, IIRC they could hide 20-30 lobsters in the tubes.
Those tubes also came in handy when returning from any overseas trips and Customs came aboard searching for booze and other undeclared contraband. Gitmo, RNAS Bermuda, and Keflavic were frequent destinations.