Scott Cassell doesn’t see a single shark on “30-Mile Dive” attempt

UPDATE: A reader has pointed out that the distance from the nearest point on Catalina Island to San Pedro’s Cabrillo Beach is approximately 18 miles, as the crow flies. Another reader has explained how the 30 mile distance was approximated in the comments. is reporting that undersea explorer Scott Cassell completed his dive from Catalina island to San Pedro, California this past Saturday (September 17). Cassell was attempting to break a world record for a continuous dive, but equipment issues required Cassell to surface mid-way through the journey.

According to, Cassell continued on with the dive after a brief surface interval on a support boat and completed the underwater trek in approximately 12 hours.

According to Cassell, his motivation for the dive was to “raise awareness about our shark populations.” He goes on to say that he remembers seeing many blue sharks (Prionace glauca) 20 years ago in the same waters he recently completed the distance dive. However, during his dive on Saturday, Cassell states that he did not see a single shark.


  1. John Stockwell says:

    RE: how the crow flies.

    A note on this: I think 30 miles was the approximate distance that Scott expected to be underwater on this dive, taking into account the currents in the area, and the extra couple miles to get inside the breakwater & around to the beach in front of Cabrillo Marine Aquarium.

    Obviously, everything did not go according to plan. I understand that due to equipment failure and exhaustion, he was out of the water on three occasions, resting, receiving medical aid, & changing gear.

    Clearly, he did not succeed at his initial goal, and he only managed to complete his crossing with breaks on a boat. But he persevered. His “30-mile dive” was successful in that the important message is still there, right? The sharks are gone.

  2. Sharon Deleske says:

    I applaud the achievement, Scott, and that you have brought attention to the plight of our shark populations. I’m heartbroken that you didn’t see any of these glorious animals. I only hope that this news opens the eyes of all of us. We need to conserve our shark species’.

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