Whatever floats your boat! Inside the world's wildest cruises - from a GRIEF-themed sailing trip to a TANTRIC SEX yachting adventure

From cats to nudism, there is a spread of cruises out there to suit all tastes. 

DailyMail.com has trawled the oceans for some of the most specialized cruises around, where themed events and parties unite passengers with common passions. 

Some of the more unusual offerings include a cruise company catering to passengers who are grieving, and another firm was founded to accommodate cruise-goers with celiac disease. 

Sail on down to see some of the wackier trips at sea, with information on how to join, should they float your boat. 

Bare Necessities: Nude cruising 

Texas-based travel company Bare Necessities has been operating clothing-optional ship charters since 1990. 

The firm highlights in its marketing materials that its trips are not sexual and its main aim is to 'dispel the misconception that it is anything but natural and beautiful.' 

It adds: 'We have made strides in the acceptance of nude vacationing and our wide range of cruise charters are a testament to our success.' 

It runs trips throughout the year in various parts of the world. 

To join the company's 11-day Big Nude Boat 2025 trip in the Caribbean, rates start at $2,000 per person for an inside cabin and bounce up to $33,155 for a three bedroom 'garden villa.' 

The company charters ships from well known cruise lines including Norwegian and Carnival and staff are not required to work if they don't feel comfortable being around naked passengers.

Star Trek: The Cruise: TV themed trips

Cruise goers are instructed to 'get ready to embark on an interstellar journey like never before,' ahead of Star Trek: The Cruise.

The 2025 seven-day trip will celebrate 50 years of Star Trek: Voyager, with a 'galaxy of entertainment' on offer. 

Various cast members will be aboard the ship, including Kate Mulgrew - who played the first and only female captain to lead a Star Trek series, Kathryn Janeway - and Jonathan Frakes, who fans will know as Commander William T. Riker from the Star Trek: The Next Generation franchise.

The trip - aboard Royal Caribbean’s Explorer of the Seas - does a round trip from Miami, with stops in Mexico and Belize along the way. 

Prices start from $2,100 for an interior cabin and run up to $10,200 for a Royal Suite, although previous guests get around a 10% discount. 

The fee does not include alcoholic beverages, dining in specialty restaurants, or artist hosted events which require sign ups or fees.

One redditor gave the Star Trek-themed cruise a thumbs up, in response to someone asking what it was like. They wrote: 'I went on the first modern one in 2017 (six-day on Norwegian Pearl). It was really fun. 

'Ran into William Shatner and his family in the elevator once and another time was in an elevator with Robert Ricardo.

'The ship was "modified", i.e., elevators were rebranded turbolifts, LCARS stickers were put up in the hallways, the ship flew a Federation flag, shops were turned into museums/exhibits for Trek props, etc.

'So many memories... Yes, it was pricey, but you have to go at least once.'

Wildcat Tattoo Cruise: Tattoo convention at sea 

Cruise goers can get a lasting memory of their time at sea, thanks to the Wildcat Tattoo Cruise this May.

The organizer says it marks Europe's first ever floating tattoo convention on a cruise ship, and there will be 50 artists offering different skills, from wildlife motifs to full body inkings. 

The trip, operated by TUI and on its Mein Schiff 4 ship, starts and ends Bremerhaven, Germany, with the two ports of call being Rotterdam in the Netherlands and Dover on the UK coast. 

Costs start from $985 per person for an inside cabin and run up to $1,204 for a balcony cabin. The costs include meals, soft drinks and certain alcoholic beverages. 

TUI said in the past that maritime symbols, such as anchors and compasses, were popular among cruise-goers, as it offered a tattoo parlor on certain cruises.

This will be the first time it has dedicated an entire cruise to the art of tattooing.  

Complementing the body art, there will be 'top-class bands from the genres of metal, punk, rock, and country play on board.' 

If the weather takes a turn, the cruise organizers say that in some cases tattooing may not be possible but each tattoo artist will decide on the feasibility of completing designs. 

The Grief Cruises: A place to grieve at sea 

Looking to 'connect grieving people more deeply with their grief and with each other,' Linda Findlay founded The Grief Cruises in 2015.

She had experienced her own battle with grief following the loss of her infant daughter and she became a certified specialist in the field working at funeral homes and hospices. 

The bereavement-themed cruises 'invite guests and their families to share stories about their loved ones' and participate in various workshops. Guests can also opt to see out their loved one with a burial at sea, attended by the ship’s captain. 

There are also the usual cruise activities on offer, including 'shows, attractions, nightlife, and shore excursions.'

The company says that the sailing trips will arm attendees with a 'sense of hope, healing, and health regarding their grief - and a suntan to boot!'

One cruise goer called Melanie who embarked on a 2019 trip wrote as her testimonial: 'What a great way to heal. The trip was fabulous and the seminar numbers were small enough to connect and share experiences. The presenters gave excellent advice.' 

The next 'grief cruise' will take place from February 23, 2025 to March 2, 2025 aboard Royal Caribbean’s Symphony of the Seas. The departure port will be Miami with stops at Bahamas, Puerto Rico and St. Maarten. 

A balcony cabin for two people costs $2,514.76 for two people plus another $600 per couple to attend the seminars.

The Swinger Cruise: Swinging and adult-only sails

The Swinger Cruise, which is U.S.-based and founded in 1997, prides itself on being the only agency to offer 'a full selection of all adult lifestyle cruises.'

Explaining its offering, the website states: 'Not every couple is looking for the same thing. Some want a couples-only, adult-only vacation. No kids and a chance to let their hair down.

'Some couples just want a chance to enjoy a clothing optional vacation. Many couples are curious about opening their relationships to include ‘play’ with other partners.

'Others just want to experience their sensuality together in a more deep and connected way.

'Overall we see participating in these full ship charters and the lifestyle as a transformational growth experience.'

The company has 10 trips on offer for 2024, with the locations spanning everywhere from Miami to the Galapagos to New Zealand. 

The Temptation Cruise, which has already set sail, featured topless pool areas and a 'Rated R Red Room' where consensual sex in public was permitted.

For those still wishing to get a slice of the action, the biggest trip of the year (set to host nearly 6,000 swingers) will take place in November on Royal Caribbean's Symphony of the Seas.

The Swinger Cruise says that the cruise, open to 35 to 65 year olds, is perfect for 'newbies, open minded adventurous couples, swingers, [and] kinksters.' 

Meow Meow Cruise: Cruises for cat lovers

Cat lover Anna Conway founded Meow Meow Cruise in 2015, after realizing that when she went on cruises, she spent lots of time with people who loved talking about their felines. 

She explains on the website: 'This is a cruise for people who love cats. 

'I find every time I go on a cruise I run into some people who love cats as much as I do and we end up sharing photos and talking about their personalities.' 

Despite the name, cats are not allowed on the sailing trips, but there are lots of feline-focused events. 

Anna generally runs one trip a year, and this year's trip set sail in February on board the Virgin Voyages Scarlet Lady ship. 

Some of the themed activities that took place included a Meow Meow Trivia night, a kitty Scavenger Hunt and a Meow Meow group dinner.

In 2025, Anna plans on running a cat-themed cruise in Alaska. 

Tantra Yacht: Exploring 'erotic expression' at sea

Running out of Croatia, Tantra Yacht invites passengers to 'gather together as a tribe for one week on a glorious yacht in the Croatian Sea.'

The website adds that the aim is for sailors to 'connect,' 'explore,' and 'learn from one another.'

It continues: 'Inviting sensuality and erotic expression as the language of the body. Inviting joy and dance as the language of the heart. Inviting silence and intuition as the language of the soul. Inviting the mystery as the blessing of spirit.

'There will be adventure. There will be transformation. There will be sensual and juicy temples to awaken and inspire you.'

There is currently a waitlist for Tantra Yacht's 2024 trip.

Prices start from $3,544 and run up to $10,906. The price includes all meals, a wine tasting, facilitated workshops, and 'temple nights / theme parties.'

The yacht can accommodate 36 passengers across 18 cabins. 

In the testimonial section, past passengers describe the experience as 'truly magical,' 'transformative,' and 'unique.'

Celiac Cruise: Gluten free sailing trips 

After her son was diagnosed with celiac disease, Maureen Basye found vacations were tricky so in a bid to put her mind at rest and help others, she founded Celiac Cruise. 

She teamed up with Royal Caribbean and worked with their chefs and executives to design a special gluten-free trip, and she said the inaugural sail in January 2020 was a 'huge success.'

She continued: 'Our guests LOVED the freedom and the worry-free environment.

'Of course, that was just the start of our journey.

'Nothing makes us happier than seeing smiles on the faces of our guests who are able to safely experience eating from a buffet for the first time or who are able to choose anything (and everything) from the dining room menu without hesitation.'

The Celiac Cruise says the three cruise lines it now works with 'take celiac disease very seriously' and the crew members are specially trained for the gluten free trips to prevent any contamination or mix-ups. 

For 2024 and 2025 there are various Celiac Cruise trips on offer around the world, from Greece to Miami. 

In a YouTube video for Celiac Cruise, passengers reveal how 'amazing' it is visiting buffets and being able to eat everything there. 

One woman says: 'Everything has been spectacular. The food has been cruise worthy and very well thought out and the desserts and the buffet was absolutely wonderful last night.  

'They even had lots and bagels on the breakfast this morning.'