Dive-site story
Located off the coast of the Coromandel Peninsula, the Alderman Islands are the eroded remnants of an ancient rhyolitic volcanic complex. Below the waterline, steep volcanic cliffs give way to dramatic pinnacles, cavernous swim-throughs, and boulder fields covered in encrusting sponges and dense kelp forests. Strong oceanic currents flush the area, attracting schools of pelagic predators alongside rich sub-tropical and temperate reef dwellers.
Towering volcanic spires and steep drop-offs carpeted in jewel anemones and sponge life
Dense schools of yellowtail kingfish hunting along oceanic current seams
Expansive swim-throughs, sea caves, and arches sculpted by wave action and ancient volcanism
Location
Use the map to plan with your operator and confirm the exact entry point on the day.
Seasonality
Warmer waters and calmer weather systems arrive in late summer and autumn, often bringing sub-tropical blue water currents.
Marine life
| Species | Likelihood | J | F | M | A | M | J | J | A | S | O | N | D |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Yellowtail KingfishSeriola lalandi | Common | ||||||||||||
| Blue MaomaoScorpis violacea | Common | ||||||||||||
| Short-tailed StingrayBathytoshia brevicaudata | Common | ||||||||||||
| Yellow Moray EelGymnothorax prasinus | Common | ||||||||||||
| Bronze Whaler SharkCarcharhinus brachyurus | Seasonal |
Marine forecast
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