Secrets of the Aquarium (2023 - 2023)

Marcus and Emma head to the Maldives on a rescue mission for an injured turtle. Back in Plymouth, Ian trains Zeus the zebra shark using a toy boat, and Andrew collects fresh seaweed for Larry the lobster.

Ian has to carry out repairs ten metres underwater in the deepest tank in Britain, and there’s a surprise for volunteer Jill, the aquarium's 86-year-old 'ray whisperer'.

Marcus installs a shark cage to allow visitors a close encounter, and a new octopus arrives from Portugal. Amelia has problems that threaten an ambitious project to replant the seagrass meadows.

There’s a surprise visit from the Princess of Wales, concern for a recent arrival, and a pregnancy test for Florence the shark.