Photo: (c) Jan Ebr & Ivana Ebrová, some rights reserved (CC BY), via Wikimedia Commons, CC BY 4.01. Hin Ngam
Koh TaoSeen on 28% of dives in October
Marine life
Siganus virgatus
Best monthly chance of seeing it per dive, at the best site in each destination.
Chances are the share of dives on which it was seen, in the best month.
Photo: (c) Jan Ebr & Ivana Ebrová, some rights reserved (CC BY), via Wikimedia Commons, CC BY 4.0Seen on 28% of dives in October
Photo: (c) portioid, some rights reserved (CC BY), via iNaturalist, CC BYSeen on 26% of dives in July
Photo: (c) Jean Jacques Godon, some rights reserved (CC BY), via iNaturalist, CC BYSeen on 25% of dives in August
Seen here: Doublebar RabbitfishPhoto: H. Schlegel, via Wikimedia Commons, PD · not taken at this siteSeen on 23% of dives in July
Photo: (c) Dan Schofield, some rights reserved (CC BY), via Wikimedia Commons, CC BY 4.0Seen on 23% of dives in September
Photo: (c) portioid, some rights reserved (CC BY), via iNaturalist, CC BYSeen on 23% of dives in July
Photo: (c) Jan Ebr & Ivana Ebrová, some rights reserved (CC BY), via iNaturalist, CC BYSeen on 22% of dives in August
Photo: (c) luluchouette, some rights reserved (CC BY), via iNaturalist, CC BYSeen on 22% of dives in October
Photo: (c) portioid, some rights reserved (CC BY), via iNaturalist, CC BYSeen on 22% of dives in August
Photo: (c) ig: underwater.logs, some rights reserved (CC BY), via iNaturalist, CC BYSeen on 22% of dives in September
Photo: Amada44, via Wikimedia Commons, CC BY SA 3.0Seen on 21% of dives in September
Photo: (c) portioid, some rights reserved (CC BY), via iNaturalist, CC BYSeen on 19% of dives in September
Photo: (c) portioid, some rights reserved (CC BY), via iNaturalist, CC BYSeen on 19% of dives in September
Photo: (c) portioid, some rights reserved (CC BY), via iNaturalist, CC BYSeen on 19% of dives in November
Photo: (c) portioid, some rights reserved (CC BY), via iNaturalist, CC BYSeen on 18% of dives in August
Photo: (c) Shane Austin, some rights reserved (CC BY), via iNaturalist, CC BYSeen on 18% of dives in August
Seen here: Moon wrassePhoto: Leonard Low from Australia, via Wikimedia Commons, CC BY 2.0 · not taken at this siteSeen on 16% of dives in September
Photo: (c) Gonzalo Ganda Álvarez, some rights reserved (CC BY), via iNaturalist, CC BYSeen on 16% of dives in August
Photo: (c) portioid, some rights reserved (CC BY), via iNaturalist, CC BYSeen on 13% of dives in August
Photo: (c) Kat Lim, some rights reserved (CC BY), via iNaturalist, CC BYSeen on 11% of dives in September
Photo: (c) portioid, some rights reserved (CC BY), via iNaturalist, CC BYSeen on 2% of dives in September
The ocean covers 70% of the planet but is the least-recorded place on Earth. Scientists can't be on every reef. Divers are.

Most ocean records come from a few coasts. Log every dive, even quiet sites.
Full dive logs show when a species goes missing. Log every animal, not just the highlights.
Change only shows up over years. Keep logging your home reef.
Lookalike species trip up records. Tag animals and add a photo.