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Survivor Bias

Discussion in 'Basic Scuba Discussions' started by jvogt, Oct 18, 2020.

  1. MaxBottomtime

    MaxBottomtime Divemaster

    # of Dives: 2,500 - 4,999
    Location: Torrance, CA
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    There are animals living below 100 feet that you won't see in shallower water. In Southern California, that means several species of rockfish, metridiums, wolfeels, and different sponges.

    32868159144_8df3fbd0d2_b.jpg

    48958730788_dd890ba8d7_b.jpg

    46055746534_178f98d28f_b.jpg

    46689205832_bf42c5865d_b.jpg
     
    AfterDark, dmaziuk, drrich2 and 4 others like this.
  2. AfterDark

    AfterDark Solo Diver

    # of Dives: 1,000 - 2,499
    Location: Rhode Island, USA
    10,264
    7,085
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    Agreed, but as you recall I was addressing 100+ diving.

    I tune out the noise people make and do what works for me.
     
    Bob DBF and Ana like this.
  3. jvogt

    jvogt ScubaBoard Sponsor ScubaBoard Sponsor

    # of Dives: 200 - 499
    Location: Lakewood, CO USA
    373
    300
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    Exactly. How does that person know?

    I know I should not do a dive that loads me with trepidation, but what of the dive I have complete confidence in? Should I consult an "expert" every time? Who is this expert in my abilities?
     
  4. jvogt

    jvogt ScubaBoard Sponsor ScubaBoard Sponsor

    # of Dives: 200 - 499
    Location: Lakewood, CO USA
    373
    300
    63
    I've seen some wonderful reef at 200'. I think "nothing worth looking at below 100" is just something told to OW students to keep them shallow.
     
    AdivingBel, Bob DBF and Ana like this.
  5. boulderjohn

    boulderjohn Technical Instructor ScubaBoard Supporter

    # of Dives: 1,000 - 2,499
    Location: Boulder, CO
    26,833
    19,704
    113
    I have dived to 315 feet in Cozumel. Things are different at different depths. There was frankly not a lot to see in the 300 foot region, but there was great black coral at around 200 feet. The big lionfish were mostly between 150-200 feet, where the DMs won't find them.
     
    Esprise Me, AfterDark and Ana like this.
  6. d^2b

    d^2b Worse diving through photography ScubaBoard Supporter

    # of Dives: 500 - 999
    Location: Canada
    210
    111
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    That's interesting about the wolfeels. We used to see wolfeels pretty shallow when I lived in Seattle. I wonder if those were a different species. It was 20 years ago or more, maybe things changed.
     
  7. MaxBottomtime

    MaxBottomtime Divemaster

    # of Dives: 2,500 - 4,999
    Location: Torrance, CA
    9,420
    9,697
    113
    The farther north you go, the shallower they are. They are cold water animals and the water is a bit colder in the PNW than SoCal. You have to go a little deeper down here.
     
  8. 100days-a-year

    100days-a-year Solo Diver

    # of Dives: 5,000 - ∞
    Location: NE Florida
    2,260
    694
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    Nice to not have to worry about some cattle boat full of kooks pulling up your spot too.
    In some areas the spearfishing, lobstering or artifact/fossil hunting starts @ 100'
     
    Ana likes this.
  9. BoundForElsewhere

    BoundForElsewhere Waiting for the zombies ScubaBoard Supporter

    # of Dives: 100 - 199
    Location: NYC
    1,731
    1,849
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    all good to know. thanks.
     
  10. Angelo Farina

    Angelo Farina Marine Scientist

    # of Dives: 1,000 - 2,499
    Location: Parma, ITALY
    1,582
    2,393
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    Here in Italy the best diving sites start at 35-40m and are wonderful down to 60m. This was the standard diving done RECREATIONALLY when I was young. We started using a twin tank (and a CC rebreather) since the first OW course, and the rec limits, at the time, were 50m, with buddy and with "light" deco (which means the deepest stop had to be 6m).
    Was it worth the risk? I think yes, as only at those depths (40-50m) you see scenarios like these ones:
    Secca Isuela, Punta Chiappa, Portofino (near Genoa):
    isuela_header_02.jpg

    Secca del Toro, Favignana (a small island south of Sicily):
    gorgonia_rossa_050955.jpg

    Red coral inside caverns at Capo Caccia, Sardinia:
    Corallo-di-alghero-800x600.jpg
     

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