Cryptic rescue

Found by kind lady "flopping about on Pennington beach". Taken to vet then to Mary & Allan for rehab ...

Fishy's a Sooty! A day later and the little fellow's all settled, feeding well (calamari & white-fish, with skin) and just wants to escape his box and fly.
Needs a good moult. Presumably plumage battered by a stormy beaching.

Fishy's a friendly bird, generous with sharing his lice with his 'mom': https://www.inaturalist.org/observations/35806794
And his 'dad': https://www.inaturalist.org/observations/35806795