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Is this a Nudibranch?

Discussion in 'Name that Critter' started by sportyluis, Dec 28, 2019.

  1. sportyluis

    sportyluis Angel Fish

    # of Dives: 50 - 99
    Location: Canada
    Hi All,

    I just got back from Hawaii where my wife and I did a lot of snorkeling. On one of swims I found this small white slug and tried to photograph it with my old compact camera. I didn't get a good shot and couldn't get close enough without touching / impacting the coral so the best I could do are these cropped photos. It initially looked to me as a Nudibranch, however the size was bigger than the ones I've seen in the past.

    Here are the relevant details:
    Location: Maui, Hawaii
    Size: ~2-3 inches?

    If this is a Nudibranch, what kind is it?

    Attached Files:

  2. Storker

    Storker Divemaster

    # of Dives: 100 - 199
    Location: close to a Hell which occasionally freezes over
    2-3 inches (5-7.5 cm) is fairly big for a nudi, but far from unreasonably so. There are nudis a lot bigger than that.

    Given how the critter looks in your pics, it's hard to imagine it being anything else.
    Perryed likes this.
  3. RogueClimber

    RogueClimber ScubaBoard Supporter ScubaBoard Supporter

    # of Dives: 50 - 99
    Location: Honolulu
    Believe that is an Imperial Nudibranch

    They often are two together appearing longer than they individually are

    Perryed likes this.
  4. Searcaigh

    Searcaigh Chromodoris gordonii Staff Member ScubaBoard Supporter

    # of Dives: 1,000 - 2,499
    Location: Dubai, UAE
    Certainly looks like a pair of what was known as Risbecia imperialis before they were renamed.

    Known location is Hawaii.
    Perryed likes this.
  5. sportyluis

    sportyluis Angel Fish

    # of Dives: 50 - 99
    Location: Canada
    Thanks for the responses! I like nudibranchs and had only ever seen really small ones before! I didn’t know they travelled in twos and perhaps that’s why it looked bigger.
  6. T.C.

    T.C. Photographer

    # of Dives: 500 - 999
    Location: Ft. Hood, TX
    That’s a nudibranch.

    Hope that answers the question. :)

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