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Catalina Sea Trek Undersea Adventure

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Address: 1 Descanso Canyon Rd, Avalon, Catalina Island, CA 90704
Phone Number:
+1 800-626-1496

Experience a universe of wonder beneath the waves. You do not need to be a...

Experience a universe of wonder beneath the waves. You do not need to be a diver or even know how to swim in order to explore the kelp forests at Descanso Beach.Our specially engineered undersea helmets allow anyone, regardless of physical ability, to safely and comfortably walk along the seafloor and view the incredible beauty of the marine world around Catalina Island.Catalina Island is known around the world for its incredible diving and water conditions. Underwater visibility typically ranges from 40-100 feet and temperatures reach into the seventies in the summer time.Hundreds of species of marine plants and animals make their homes around the island and in the waters off Descanso Beach.Come join us on a journey that you will never forget!Ages 12 and up.

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TripAdvisor Reviewer Highlights

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Fish, Fish Everywhere!

This tour is a bit of a wallet burner. The admission was almost $10 more pp than what was advertised on the Internet (this is the Nautilus being reviewed here), they take pictures... read more

Reviewed 14 October 2015
Elizabeth W
via mobile

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9 Reviews from our TripAdvisor Community

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Showing 9: English reviews
1 review
Reviewed 8 July 2016

I did Sea Trek in Cozmel 3 weeks prior and loved it. Catalina experience was horrible. They staff was great but would not recommend spending the money.I had to swim way too far, crossed over dangerous rocks to even get to the water. There were rocks in the sea trek area that I tripped over because the visibility was bad.... More 

Thank Sherry A
Level Contributor
56 reviews
31 attraction reviews
common_n_attraction_reviews_1bd8 36 helpful votes
Reviewed 14 October 2015 via mobile

This tour is a bit of a wallet burner. The admission was almost $10 more pp than what was advertised on the Internet (this is the Nautilus being reviewed here), they take pictures as you board the sub which you can purchase after, and there are fish food torpedoes on the sub you can purchase and fish food shoots out... More 

Thank Elizabeth W
Saint Charles, Missouri
Level Contributor
180 reviews
37 attraction reviews
common_n_attraction_reviews_1bd8 51 helpful votes
Reviewed 31 August 2015 via mobile

You will see amazing fish so close up. It's worth your 45 minutes and $. Fun for kids and the kid inside us all. Going to the bottom seating area, it is wall to wall windows. Nothing claustrophobic about it- it's wide open. No need for Dramamine, unless your tummy is super sensitive. You can even get some good photos,... More 

Thank runnergirl080
2 reviews
common_n_attraction_reviews_1bd8 2 helpful votes
Reviewed 30 June 2015 via mobile

Came for my daughters sweet 16. We chose to do this adventure. Im very afraid of the water even more putting my face in the water.do the thought of walking on the bottom of ocean was terrifying. I went down and freaked out as soon as my face hit the water came back up thinking this isnt gonna happen the... More 

1 Thank Leia C
2 reviews
common_n_attraction_reviews_1bd8 2 helpful votes
Reviewed 20 May 2014

We have been on this semi-submersable sub 2 times in the last 6 months, and my kids love it. My 1 old yells at the top of his lungs- FISH as we move through the water. And my 3 and 5 year old thought the fish and the food torpedoes were awesome. If you get sea sick, take your dramamine... More 

Thank liz m
Burlington Flats, New York
Level Contributor
66 reviews
29 attraction reviews
common_n_attraction_reviews_1bd8 38 helpful votes
Reviewed 15 March 2014

Part of a package, and leaves right from the pier. Staff was knowledgeable about different fish, and were able to feed them, with debit card available, of course.

Thank anymember
Orange County, California
2 reviews
Reviewed 30 August 2012

The guide and underwater experience was hands down worth it, and I am not a water person at all. I live on the beach and rarely go in beyond my ankles. The promise of photos "the next day", however was way off. It took a while to get the photos even after emailing them a few days after our tour.... More 

Thank Top M
Dallas, Texas
Level Contributor
17 reviews
11 attraction reviews
common_n_attraction_reviews_1bd8 3 helpful votes
Reviewed 1 August 2012

I am not a fan of underwater activities - specifically snorkeling. Get panicky worrying about water getting in the mask, sucking in water, not being able to see (I wear glasses). However, the Trek was perfect. The helmet enabled me to wear my glasses and breathing was a breeze. Basically, the helmet is an updated diving helmet. Guide was fabulous.... More 

1 Thank BlotDallas_Texas
Southern California
Level Contributor
16 reviews
8 attraction reviews
common_n_attraction_reviews_1bd8 10 helpful votes
Reviewed 23 June 2012

The whole family of 7 had an amazing time! The experience itself was spectacular...walking on the ocean floor, 30 feet underwater amidst a kelp forest, local sea bass, garibaldi and tons of baitfish. Seeing the look of utter glee on my 7 year olds face was the best part while he jumped up and down semi weightless like walking on... More 

Thank Jim_Ulcickas

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Questions & Answers

Here's what previous visitors have asked, with answers from representatives of Catalina Sea Trek Undersea Adventure and other visitors
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10 months ago
Surprise, Arizona

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Typical questions asked:
  • Will you pick up and drop off at my hotel?
  • I have a family of 7. Can your tour accommodate all of us together?
  • How should I dress for this tour?