Cimasub kicks off its 25/26 Tour in Eibar

Following the huge success of the 49th edition of Cimasub, held in San Sebastian on November 13, 14, and 15, we are launching the Cimasub Tour 25/26, which will take us to more than 30 locations to continue sharing the magic of the underwater world with as many people as possible.

“I believe that the feeling the audience will have when they see ‘Ultramarine’ for the first time will be that of creating a new reference point”

‘Ultramarine’, the short film by Maren Zubeldia and Silvina Guglielmotti, arrives at Zinebi exploring non-binarity and questioning social traditions through the lens of a fishing village. In this interview, the directors discuss how the story came about, the challenges of filming —including high tides and flooded locations— and the excitement of premiering at home. They also explain the aim of their project: to create role models, spark debate, and provide a safe space for those who identify with the story.

CIMASUB 2025 has established itself as an unmissable event for the global underwater imaging industry and confirms the loyalty of the Donostia public with another sold-out event.

The 49th edition of CIMASUB, the Donostia – San Sebastián International Underwater Film Festival, has concluded with extraordinary success and a massive response from the public, consolidating the festival as an essential reference point for professionals and lovers of the underwater world. Over the past week, the event once again fulfilled its main mission: to inspire, educate and excite through audiovisual presentations and activities focused on marine awareness.

CIMASUB 2025: three film sessions to discover the truth about the sea

CIMASUB, the Donostia-San Sebastián International Underwater Film Festival, returns for its 49th edition with a program that promises three intense nights of cinema dedicated to the ocean. On November 13, 14, and 15, the Teatro Principal in San Sebastián will host a selection of short films and documentaries that combine visual beauty, social commentary, and environmental commitment.

Educate to protect: The underwater Txikiziklo at the San Sebastian Aquarium

From November 10 to 14, the San Sebastián Aquarium will host one of the most notable activities of CIMASUB 2025: the Txikiziklo Submarino, an educational program designed to awaken in young people a love and respect for the oceans.

The ocean in images: CIMASUB’s photographic exhibitions fill San Sebastián with underwater life

This November, San Sebastián will dive into the depths of the ocean thanks to the CIMASUB 2025 photography exhibitions, which will transform the city into a veritable showcase of the beauty and diversity of the underwater world.

‘The truth before your eyes’ in the trailer for CIMASUB 2025 in San Sebastián

The Donostia-San Sebastián International Underwater Film Festival (CIMASUB) is thrilled to present the official trailer for its 49th edition, offering a sneak peek at what promises to be a unique cinematic experience that will take audiences on a journey to explore the immensity of the ocean and its secrets.

The official program for CIMASUB 2025 is here! Discover everything that awaits you at the 49th edition.

The Donostia-San Sebastián International Underwater Film Festival (CIMASUB) presents the complete program for its 49th edition, to be held this November. An unmissable event for lovers of the sea, nature, and underwater imagery.

Although I’m not Basque by birth, everything I do has Basque roots; I feel at home here and want to reflect that in my stories

Director Gastón Haag presents ‘Tragedium’, his absurd sci‑fi comedy that blends humour, horror and fantasy. After a successful run at over 60 festivals and winning 17 awards, Haag will bring his short film to the Brigadoon section at Sitges, cementing his work as a fresh and original take within genre cinema.

We now know the winners of CIMASUB 2025! The sea takes centre stage once again in an unforgettable edition.

CIMASUB 2025 has announced its official winners, and with them we celebrate an edition that has made us dream, dive and thrill to every story screened. This year, the festival reminds us once again why underwater cinema is a unique window onto the wonder and beauty of the oceans.