The Marine Conservation Society (MCS), which has a sponsorship deal with Sea Life, said that it was concerned about mortality rates, particularly among the aquarium’s sharks and rays. Of the 2,293 animals held at the aquarium in 2015-16, more than a third, 812, had died. Among sharks and rays a fifth had died, about double what would have been expected.
The aquarium attributed the high death rate in part to jellyfish, which live for a matter of months and make up 40 per cent of its displays. However, it admitted that there had been a problem with its water system, which was “highly unusual and technically complex”. This had been resolved, but caused “exceptional and deeply regrettable losses”.