Darth Vader is the second named site on Pellowe Reef, and its name comes from the deep valleys that cut into the reef here. Cairns Dive Adventures explains that these valleys create a dark atmosphere, as the steep coral ridges on either side shade the floor of each gully and the light fades as you descend. The effect is dramatic, especially on a bright day when the reef top is sunlit and the valleys drop away into blue shadow.

Pellowe as a whole is a small, isolated reef close to the continental shelf edge, visited only in suitable weather and consequently in good condition, with strong soft- and hard-coral cover and excellent visibility. Pro Dive Cairns rates it novice to intermediate with moderate currents and depths of 5-30 m, and highlights large pelagic fish, chevron barracuda and nudibranchs. In the valleys the walls are decorated with soft corals, sea fans and sponges that prefer shade, and the gullies funnel current, drawing in schools of fish.

Look up and out into the blue for trevally, barracuda and reef sharks, and along the walls for moray eels, octopus and nudibranchs. Napoleon wrasse and bull rays have been reported on Pellowe. Because the valleys encourage divers to follow them down, depth control matters here, and the site is best for divers with some experience.

Published detail is limited to the operator summaries, so the route will depend on the guide's briefing on the day. It pairs naturally with Cucumber Alley on a calm-weather Pellowe day, giving a wall and a valley dive on the same small reef.

Boat access only. Cairns day boats leave from the Reef Fleet Terminal (1 Spence Street) and the neighbouring Marlin Marina on the city waterfront, with check-in between about 7:00 and 8:00 am; most operators run transfers from city and northern-beaches accommodation, and there is paid parking near the terminal. The run of about 61 km out through Trinity Inlet and across the lagoon to Pellowe Reef takes around 82 minutes on a fast catamaran and noticeably longer on slower dive boats or into a south-easterly chop.

Darth Vader is one of two named Pellowe sites used by Silverswift, Passions of Paradise and Pro Dive Cairns in calm weather. Enter from the stern and descend promptly.

The prevailing south-east trade winds (typically 15-25 knots from April to September) are what limit Cairns outer-reef diving: above about 25 knots trips may be cancelled, and exposed eastern moorings are used only in light winds. Summer northerlies are gentler but make north-facing moorings choppy. Box jellyfish and Irukandji are present from about November to May (stinger suits on every dive), and the cyclone season runs November to April, when a system in the Coral Sea can close the reef for days.

Visibility drops after heavy rain and strong winds; spring is usually calmest and clearest. As with Cucumber Alley, Pellowe's exposed shelf-edge position means Darth Vader is only dived in calm to moderate conditions, and current can run on spring tides.

Descend to the head of a valley and follow it down between the coral ridges to 18-25 m, staying close to the walls and watching gas and no-decompression time. Turn at a third of your gas and climb back up a neighbouring valley to the reef top for a safety stop at 5 m.

Silverswift and Pro Dive Cairns – occasional, in suitable weather; Passions of Paradise – occasional; Pellowe is visited only on calm days, so trips there are opportunistic rather than scheduled; the mooring used on any day is chosen by the skipper according to wind, tide and other boats