This is the moment an urban explorer enters an abandoned aquarium in Spain and finds a dead squid on the floor and a rotting shark in a tank.

The eerie clip was filmed by Juliette, 24, from the French city of Lyon, during a visit to Spain.

She posted the clip on her TikTok page, where it has gone viral, with nearly 5 million views.

In the footage, Juliette is filmed climbing through a window into the abandoned aquarium before coming across a rotting shark and a dead squid on the floor.

She accompanied the video with the message: “The horror. See my exploration and you will be shocked!”

Juliette, who joked that she is “full time on YouTube”, told Newsflash: “The aquarium is in Spain. The dead animals we came across included fish, squid and a shark.”

When asked if she was surprised that her video went viral, she said “yes”, adding: “But the shark is very impressive, so it definitely appeals to many.”

Juliette told Newsflash that “urbex has been my passion for four years”.

‘Urbex’ is an abbreviation of ‘urban exploration’, a hobby that involves going off the beaten track to explore abandoned buildings or other facilities that are unseen by the general public.

Juliette boasts 725,000 followers on her TikTok page ‘Jurjurbex’, where she posts images of her urban adventures and the abandoned sites she has visited.