Lakka Dive Site, Zakynthos: underwater arch and rocky reefs

The dive begins by approaching the rocky coastline from the open sea. After the boat moors offshore, you move towards the reef to find the transition from the sandy bottom to the rising rock formations. The site is defined by its complex topography, where the rocky seabed meets steep, descending walls. As you descend, the structure becomes increasingly intricate with various outcrops and vertical faces.

The central feature of Lakka is a large underwater arch, known locally as the Arch of Triumph. The top of this structure sits at approximately 12 metres, providing a clear landmark for navigation. Passing through the arch allows you to transition between different sections of the reef. This area serves as a primary point of interest where the light often hits the rock surfaces in interesting ways.

Beyond the main arch, the site opens into a series of caves and narrow cavities. These geological features are integrated into the descending walls that reach depths of about 24 metres. Some of these openings are quite tight, requiring careful buoyancy control to navigate without contacting the rock. The walls themselves are heavily textured, providing a massive surface area for various marine organisms to inhabit.

The vertical surfaces are notably covered in a dense layer of colorful sponges. These encrusting organisms follow the contours of the rock, creating a vibrant backdrop for the dive. As you move along the wall, you will find that the sponge growth varies in thickness and hue depending on the light and the specific depth. This biological coating is one of the defining visual characteristics of the Lakka reef.

Resident fauna is frequently found tucked into the many crevices and shadows of the reef. You can often spot moray eels and octopus sheltering within the rock holes or under ledges. Smaller species like blennies, damselfish, and wrasse are highly active along the reef edges and around the edges of the arch. These fish move through the water column or dart between the small cracks in the stone.

Larger reef residents such as groupers, sea bream, and sea perch are commonly seen patrolling the deeper sections of the wall. If you maintain a steady profile, you may also encounter parrotfish and slipper lobsters amongst the coral and sponge structures. For those keeping a close eye on the rockwork, loggerhead sea turtles are known to frequent these waters, moving steadily through the mid-depth zones.

The experience at Lakka is shaped by the interplay between the open water and the protected pockets of the caves. While the descent is straightforward, the variety of the terrain means you are constantly switching between open reef swimming and more technical navigation near the crevices. This combination of scale, from the large arch to the small holes, makes the site a comprehensive reef exploration.