Jellyfish populations across the Mediterranean and other prime cruising grounds have increased dramatically over the past two decades, driven by warmer sea temperatures and shifting ocean chemistry. The inflatable pools for superyachts developed by GSE Inflatables provide a permanent, elegant solution, and this guide covers everything you need to know before selecting a model for your vessel.
Understanding Sea Pool Technology
A sea pool is an inflatable enclosure that attaches to the stern of a vessel and sits partially submerged in the sea. Its walls are constructed from high-pressure PVC, while its submerged panels incorporate fine-mesh netting that allows water to circulate freely but physically blocks jellyfish and other marine organisms. The swimmer is immersed in genuine seawater — constantly refreshed by the sea itself, requiring no pumps, filtration chemicals or heating — in a fully protected environment.
GSE Inflatables uses UV-stabilised monofilament mesh with a tested pore geometry that excludes juvenile jellyfish while allowing adequate water exchange. The inflatable frame uses drop-stitch welded PVC construction, providing a structure that maintains its shape in moderate sea states while absorbing the movement of the vessel.
Choosing the Right Model
Our range begins with the compact anti-jellyfish pool (3 × 3 metres) ideal for smaller yachts, through the yacht pool (4 × 3 metres) — the most popular model for 35–50 metre charter yachts — and the sea pool (5 × 4 metres) providing genuine swimming space for six to eight guests. At the top of the range, the boat pool (6 × 5 metres) delivers the closest experience to a proper swimming pool.
Best Practices for 2026 and Beyond
The best-performing sea pools in our customer fleet attach the pool as part of the anchoring routine, inspect mesh panels daily and rinse after each use. For vessels that also carry an inflatable platform, the sea pool can be configured to abut the platform, creating a seamless transition from deck to swimming area. Pair this with a boat slide for a completely integrated aquatic entertainment setup.
The Definitive Choice for Protected Swimming at Sea
An anti-jellyfish sea pool from GSE Inflatables is the most reliable, lowest-maintenance solution to open-water swimming protection available to the superyacht market. Contact our team to discuss which model is right for your vessel.