Yellow Boxfish; Ostracion cubicus

“As the name suggests, the Yellow Boxfish is box-shaped”. It’s good to see that Wikipedia have a healthy sense of humour!

The small, bright yellow, black-spotted, juvenile form of this fish is a total favourite when seen on diving trips. They are often found sheltering in nooks and crannies at dive sites such as Sail Rock or Anthong National Marine Park.

The adult has a more subdued blue and grey colouration, in a hexagonal pattern – and they can grow to surprisingly large sizes.