passengers should avoid breaking key "unspoken rule" of travelling on the high seas, a travel outlet warns.

shared a series of tips on how passengers can avoid dirty looks or even being kicked out of some areas of the vessel for easy mistakes. The outlet warned travellers, "don't be fooled by a cruise ship's 'everything's fun' and 'we're all on vacation here' vibe, as not adhering to the dress code could see you getting the "side eye or asked to leave the venue - or maybe both".

There can be some specific rules for what you can wear in different parts of the vessel, and according to the outlet, one in particular tends to be firmly enforced.

The website says "the biggest one that is actually spoken loud and clear from the ship's crew and blasted across all ship-wide communications", namely that swimwear is "only allowed on the pool deck".

But unwritten rules, which may see you getting an eye-roll, include never wearing your pyjamas outside the cabin, or going to the buffet barefoot or shirtless.

You can find their full breakdown of all the unspoken rules to keep you out of trouble with the crew on your next trip .

Rules between cruises can vary, so it's best to check the dress code policies before you begin your journey.

Cruise holiday expert Tim from who goes by on TikTok shared a video fancier eateries.

A travel expert at Travel Lens previously told : ".

"If not, we'd recommend men wear a shirt with trousers or a pair of smart chino-like shorts and avoid trainers.

"Some restaurants often ask guests not to wear vests and casual t-shirts, so it's worth checking beforehand. For women, knee-to-floor length dresses and skirts are a favourable choice, accompanied by smart footwear, so avoid flip-flops and sandals, but it's important to remain comfy, so don't feel like you need to wear high heels, as flat shoes will be fine."

You can find out more about the firm's advice for what to pack .