Capros ater. This is 'Denzel', one of the specimens featured on the Aquarium's website - which encourages children to look for him, as he is a small fish in quite a large aquarium. He was caught nearby, which is unusual for this uncommon deepwater species: he had to be nursed back to health before being put on show.
Great ! A fish with a story. Normaly only Apes, Elephants, Orca's and Hippos ( among others of course ) have a story but that such a small, unknown, boaring ( ) fish got in the spotlight - and making its species in this way better-known among the big audience - makes my day, Thanks gentle lemur !
@Ebirah766 Don't apologise You are quite right, and as a pedant myself, I feel mildly ashamed, but I appreciate the correction.
I have checked the photos of this species that I posted last year, and I was relieved to see that I got it right the second time.