Marine life

Where to see Three-spot Dascyllus

Dascyllus trimaculatus

Dive sites
16
Destinations
1
By destination

Three-spot Dascyllus, destination by destination.

Best monthly chance of seeing it per dive, at the best site in each destination.

Best sites

The best dive sites to see it.

Chances are the share of dives on which it was seen, in the best month.

  1. Herring Scad near Southwest PinnaclePhoto: (c) portioid, some rights reserved (CC BY), via iNaturalist, CC BY

    1. Southwest Pinnacle

    Koh Tao
    Advanced Open Water4-40 mBig animalsCoralDriftAbove your levelLevel not known: check before you book

    Seen on 42% of dives in September

  2. White-eyed Moray near Chumpon PinnaclePhoto: (c) portioid, some rights reserved (CC BY), via iNaturalist, CC BY

    2. Chumpon Pinnacle

    Koh Tao
    Advanced Open Water12-45 mAbove your levelLevel not known: check before you book

    Seen on 26% of dives in November

  3. Phallusia arabica near White RockPhoto: (c) portioid, some rights reserved (CC BY), via iNaturalist, CC BY

    3. White Rock

    Koh Tao
    Open Water2-26 mBig animalsCoralAbove your levelLevel not known: check before you book

    Seen on 15% of dives in July

  4. Moon wrasse, seen at HTMS Sattakut (photo taken elsewhere)Seen here: Moon wrassePhoto: Leonard Low from Australia, via Wikimedia Commons, CC BY 2.0 · not taken at this site

    4. HTMS Sattakut

    Koh Tao
    Advanced Open Water18-31 mWreckAbove your levelLevel not known: check before you book

    Seen on 12% of dives in July

  5. Titan Triggerfish imported from iNaturalist photo 51505047 on 2 November 2024 near TwinsPhoto: (c) Dan Schofield, some rights reserved (CC BY), via Wikimedia Commons, CC BY 4.0

    5. Twins

    Koh Tao
    Beginner5-25 mCoralAbove your levelLevel not known: check before you book

    Seen on 11% of dives in July

  6. Blacktip Grouper near Green RockPhoto: (c) portioid, some rights reserved (CC BY), via iNaturalist, CC BY

    6. Green Rock

    Koh Tao
    Open Water4-32 mCave and cavernCoralAbove your levelLevel not known: check before you book

    Seen on 10% of dives in September

  7. Diving Ko Tao, Thailand 1124 near Koh Nang YuanPhoto: Amada44, via Wikimedia Commons, CC BY SA 3.0

    7. Koh Nang Yuan

    Koh Tao
    Level not yet knownAbove your levelLevel not known: check before you book

    Seen on 9% of dives in October

  8. Pearly Monocle Bream near Japanese GardensPhoto: (c) portioid, some rights reserved (CC BY), via iNaturalist, CC BY

    8. Japanese Gardens

    Koh Tao
    Beginner2-18 mCoralAbove your levelLevel not known: check before you book

    Seen on 9% of dives in October

  9. Mottled Lightfoot Crab near Junkyard ReefPhoto: (c) Kat Lim, some rights reserved (CC BY), via iNaturalist, CC BY

    9. Junkyard Reef

    Koh Tao
    Beginner7-12 mMacroAbove your levelLevel not known: check before you book

    Seen on 8% of dives in October

  10. Smalltooth Emperor near No NamePhoto: (c) ig: underwater.logs, some rights reserved (CC BY), via iNaturalist, CC BY

    10. No Name

    Koh Tao
    Advanced Open Water11-30 mWreckAbove your levelLevel not known: check before you book

    Seen on 8% of dives in October

  11. Doublebar Rabbitfish, seen at Laem Thien Bay (photo taken elsewhere)Seen here: Doublebar RabbitfishPhoto: H. Schlegel, via Wikimedia Commons, PD · not taken at this site

    11. Laem Thien Bay

    Koh Tao
    Open Water4-14 mAbove your levelLevel not known: check before you book

    Seen on 4% of dives in July

  12. Scissortail Sergeant near Mango BayPhoto: (c) Shane Austin, some rights reserved (CC BY), via iNaturalist, CC BY

    12. Mango Bay

    Koh Tao
    Beginner2-20 mCoralAbove your levelLevel not known: check before you book

    Seen on 4% of dives in October

  13. Redbreast Maori Wrasse near Lighthouse PinnaclePhoto: (c) Gonzalo Ganda Álvarez, some rights reserved (CC BY), via iNaturalist, CC BY

    13. Lighthouse Pinnacle

    Koh Tao
    Beginner5-18 mWallAbove your levelLevel not known: check before you book

    Seen on 4% of dives in November

  14. Bubble Coral near HTMS Hanhak Sattru WreckPhoto: (c) portioid, some rights reserved (CC BY), via iNaturalist, CC BY

    14. HTMS Hanhak Sattru Wreck

    Koh Tao
    Open Water16-28 mDriftWreckAbove your levelLevel not known: check before you book

    Seen on 1% of dives in July

  15. Monofin Dartfish near Aow TanotePhoto: (c) portioid, some rights reserved (CC BY), via iNaturalist, CC BY

    15. Aow Tanote

    Koh Tao
    Beginner2-20 mCoralWreckAbove your levelLevel not known: check before you book

    Seen on 1% of dives in July

  16. Pillow Cushion Star near Shark IslandPhoto: (c) portioid, some rights reserved (CC BY), via iNaturalist, CC BY

    16. Shark Island

    Koh Tao
    Open Water3-30 mBig animalsCoralWallAbove your levelLevel not known: check before you book

    Seen on 1% of dives in July

Citizen science

Turn every dive into ocean science

The ocean covers 70% of the planet but is the least-recorded place on Earth. Scientists can't be on every reef. Divers are.

Make your dives countLog a dive
  • Free to join
  • Works with your dive computer
What happens to one sighting
A mobula ray swimming in open blue water, a remora on its back
Mobula rayMobula sp.15 m · Princess Alice Bank, Azores
  1. You log itWhat you saw, from your dive computer file or by hand.
  2. We check itPinned to the dive site and matched to a scientific name.
  3. Scientists can use itKept with its date, depth and place, in the format the big open species databases like GBIF use.

What scientists need, and how you help

  • More places

    Most ocean records come from a few coasts. Log every dive, even quiet sites.

  • What wasn't there

    Full dive logs show when a species goes missing. Log every animal, not just the highlights.

  • Same reefs, every year

    Change only shows up over years. Keep logging your home reef.

  • Names they can trust

    Lookalike species trip up records. Tag animals and add a photo.