Bio-Wreck — Pemuteran Bay Dive Site

Overview

Bio-Wreck is one of Pemuteran Bay’s most photographed sites — two artificial Biorock structures sunk in 2005 and connected to low-voltage solar panels, accelerating coral growth on the metal frames. Sitting alongside the structures is a porites coral colony believed to be over 1,000 years old, said to be the largest single porites in Bali. The site also features the iconic Bio-turtle structure. Just five to ten minutes from shore and shallow enough for snorkelers, it’s a reliable, beginner-friendly dive with conservation context built in.

Marine life & what to expect

The electrified Biorock frames have grown into living reef structure over two decades, attracting a steady stock of reef fish and macro subjects. The shallow profile keeps the dive bright and colourful, and the proximity of the ancient porites adds context most artificial reefs simply don’t have. The Bio-turtle structure in particular is a favourite for wide-angle photography — its silhouette against blue water makes a clean foreground subject, and reef fish school densely around it through the day. Macro shooters will find the encrusting growth on the older Biorock frames is dense with hydroids, tunicates, and small invertebrates. Common sightings include:

• Reef fish — sweetlips, snapper, butterflyfish, anthias
• Nudibranch on the structures and surrounding bommies
• Lionfish and scorpionfish on the wreck frames
• Garden eels in nearby sand patches
• Ribbon eels, moray eels, and the occasional octopus
• Boxfish, pufferfish, and shoals of fusiliers passing through
• Macro subjects on the ancient porites coral
• Excellent at night — crustaceans and hunting predators

Dive profile

Best for

Beginners on their first open-water dives, snorkelers who want to share a site with their dive partners, and divers looking for a relaxed photo dive with a story. Particularly strong as a night dive — the structures attract feeders and the shallow depth means generous bottom time. The site is also a natural fit for refresher dives or check dives at the start of a multi-day trip: shallow, sheltered, with enough visual interest to hold attention while you re-find your buoyancy. Pemuteran Bay’s protected geography means surface conditions are typically calm even when other parts of Bali are rougher.

When to dive it

Pemuteran Bay is sheltered by Bali’s northwest coastline, so Bio-Wreck is divable virtually year-round. Dry season months (April–November) bring the best surface conditions and visibility. Mornings tend to be calmer and clearer; afternoons can pick up a light surface chop. Because the site sits five to ten minutes from our beachfront bases, it pairs naturally with a second dive nearby — we often combine it with Close Encounters or a shore Biorock dive at Karang Lestari.