Kona Airport, off Kona Airport, Hawaii, USA

• Iain Hosking

Not the night dive with mantas. Lights set up, circle of divers sitting on the seabed with torches pointing upwards, an atmosphere of expectation. Above us were columns of silvery fish, and winding its way around us was Frank the Eel. But no plankton worth speaking of, so no mantas. Disappointing is an understatement. But watched an eel hunting (quite creepy, especially if you're a small reef fish), crabs and an octopus. Rated 4 stars for its inherent value as a pleasant night dive.

Deck crew: Bo. Other divers: Father and son from Utah; single guy from Austria; another father and 2 sons.

Kona Honu Divers' gear: wetsuit, Cressisub slip-on fins, BC, reg, torch. Own mask and second torch.

See logbook 10