Triggerfish City, Tubbataha South Atoll: Wall and Reef Drift

Triggerfish City is located on the southwest side of Tubbataha's South Atoll, positioning you near the lighthouse and the Delsan Wreck sector. The dive begins over a reef top at a minimum depth of 5 meters, characterized by undulating fields of staghorn coral interspersed with sand patches. This shallow plateau then gives way to the edge of a vertical wall, extending well beyond recreational dive limits. You'll typically approach this site as a boat drop from a liveaboard, initiating a drift along the reef and the wall's edge.

The topography here sets it apart from many of Tubbataha's purely vertical walls. The combination of a broad, coral-rich shallow reef that gently undulates before plunging into the deep offers varied environments within a single dive. As you drift along, the interplay of light on the reef crest contrasts with the blue expanse of the wall, presenting distinct ecological zones as you control your depth.

The site earns its name from the sheer numbers and assertive presence of triggerfish. The shallow reef top is a convergence point for redtooth triggerfish (Odonus niger), often seen in large groups. Descending along the wall or near nesting areas, you will encounter territorial titan triggerfish (Balistoides viridescens). Their aggressive defense of nesting sites during breeding season is a notable characteristic of this dive, giving the site its reputation for close interactions.

Beyond the triggerfish, the site is recognized for its schooling juvenile grey reef sharks (Carcharhinus amblyrhynchos), often encountered along the wall edge. These aggregations offer a glimpse into the early life stages of these apex predators. Alongside them, dense schools of pyramid butterflyfish (Hemitaurichthys polylepis) often carpet sections of the wall, adding a vibrant layer of activity to the already rich environment.

As you move further along the wall, the possibility of encountering larger pelagic species increases, particularly in this region of the South Atoll. While not guaranteed on every dive, manta rays (Manta birostris) are known to frequent this zone, gliding past in the blue. Keeping an eye on the open water beyond the wall is always part of the dive profile in areas like this.

Currents at Triggerfish City are generally moderate, making for a comfortable drift dive along the reef and wall. However, conditions can vary; currents have been observed to pick up along the wall, influenced by tidal shifts and seasonal flows within the Tubbataha channel. You should be prepared for varying drift speeds, particularly when transitioning from the calmer reef top to the more exposed wall sections.

Visibility at this site consistently ranges from 30 to 45 meters, providing clear views of both the shallow reef details and the expansive wall into the blue. This excellent visibility enhances the experience of tracking schooling fish and observing the distant pelagics. The clarity of the water allows for appreciation of the extensive coral formations that line the wall, many of which remain pristine.