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Countries with the Most Coral Reefs

Try to name the 20 countries that have the most coral reefs by area.
Includes external territories!
Source
Quiz by
jafe
Featured Quiz
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Last updated: January 1, 2020
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First submittedMay 22, 2018
Times taken47,495
Average score65.0%
Rating4.75
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km²
Country
51,020
Indonesia
48,960
Australia
25,060
Philippines
14,280
France
13,840
Papua New Guinea
10,020
Fiji
8,920
Maldives
km²
Country
6,660
Saudi Arabia
6,110
Marshall Islands
5,790
India
5,750
Solomon Islands
5,510
United Kingdom
4,340
F. S. Micronesia
4,110
Vanuatu
km²
Country
3,800
Egypt
3,770
United States
3,600
Malaysia
3,580
Tanzania
3,260
Eritrea
3,150
Bahamas
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32 Comments
NINJAQKk
+13
Level 70
Jan 1, 2020
Nice quiz! Surprised to see tiny Oceania countries on here but not big ones like Brazil.
IsleAuHaulte
+6
Level 92
Jan 1, 2020
They're big in terms of ocean expanse I guess.
stevediverse
+19
Level 87
Jan 1, 2020
Coral grows (best) in warm water, and coral reefs in shallow, clear water (so it gets sun). So it's more a function of proximity to the right growing conditions than it is to total length of coastline.
Dollyfroggy
+1
Level 63
Jan 10, 2024
Yeah I was less surprised about Oceania and more surprised that some African / Middle Eastern countries beat out Brazil, Chile, Mexico, etc.
Dontforget
+3
Level 75
Dec 16, 2025
There are two main groups of corals: subclasses Hexacorallia (stony corals) and Octocorallia (soft corals).

The octocorals very common and abundant in the Caribbean but they don't contribute to the formation of reefs. I don't know for certain, but I suspect the relative abundance of hexa and octo corals may also contribute to fewer countries in and around the Caribbean making the list

plattitude
+14
Level 95
Jan 13, 2020
The north African/Arabian areas surprised me. Never thought about the Red Sea having reefs.
kalbahamut
+10
Level 80
Feb 19, 2020
lots of diving around Jeddah, Sharm al-Sheikh, Eilat and Aqaba.
TjizzleDizzle
+10
Level 68
Feb 19, 2020
Given it's underwater.......can't help thinking of Aquaba instead of Aqaba. xD
Jezilly
+2
Level 80
Feb 20, 2020
The Red see is beautiful for reefs. Great snorkelling and the bluest waters.
TuxKnight
+1
Level 57
Dec 16, 2025
What? You never played Endless Ocean: Blue World?

If you have a Wii or Wii U, you definitely should give it a shot.

ChaosLord
+8
Level 78
Feb 19, 2020
Completely failed to take overseas territories into account. Still, managed 15/20, I'm fairly happy with that.
tylerdavid
+11
Level 76
Feb 19, 2020
I always thought Belize was known for its coral reef, but I guess it's not very large.
DaveM
+13
Level 76
Feb 19, 2020
Bit surprising that Belize is considered to have the second largest coral reef in the world but doesn't make the top 20 in terms of overall reef square mileage
Geopro
+1
Level 59
Feb 19, 2020
Missed only Tanzania and Eritrea. Great quiz.
Findlay
+3
Level 80
Feb 19, 2020
I feel like as a Queenslander, if there's one thing we should know its coral. Pretty much the main reason anyone comes here - the Great Barrier Reef. Managed to get them all in the end with about 30 seconds remaining. I was stuck for a while, but Egypt was a breakthrough and gave me Eritrea and Saudi Arabia.
Yamaneko
+7
Level 78
Oct 25, 2020
Really surprised to not see Uzbekistan right there!
Gogoplata
+2
Level 57
Nov 29, 2020
france = reuinion?
jafe
+8
Level 86
Nov 30, 2020
Also French Polynesia and Caribbean islands.
DukeOfLorraine
+5
Level 66
Jun 30, 2022
And New Caledonia
tshalla
+2
Level 78
Jul 2, 2022
Wallis and Futuna too.
Devvik2
+1
Level 74
Apr 17, 2022
Ugh, I got all of them besides an obvious one! I missed Phillippines, I kind just forgot it existed. Fun quiz though!
AGeogrpahyNerd
+2
Level 55
Jul 1, 2022
No way the Bahamas has more than Mexico, I thought they had a lot.
HottestPakiEver
+1
Level 52
Sep 5, 2022
got them all
GRstranter
+2
Level 38
Nov 12, 2022
19/20 I thought Eritrea but didn't type it bacause it is small

My finger was on E but for some reason i typed Sudan

FunjoBunjo
+1
Level 54
Jun 28, 2023
Did Tuvalu and my brain acted like it included Vanuatu too, I also somehow did that with the Solomon Islands and thought Marshall Islands as well. xD
Jugler
+1
Level 60
Dec 23, 2023
no belize?
RodrigoRavani
+1
Level 45
Jan 4, 2024
Only missed Eritrea, great quiz!
Jato
+3
Level 70
Jan 5, 2024
Is it just me, or does the source link’s server not work anymore?
jafe
+3
Level 86
Jan 5, 2024
Ugh, looks like you're right. Gotta find a working source or link to an archived version. Thanks for pointing it out.
BCP
+2
Level 71
Jul 16, 2024
Amazed that Eritrea is here but Indonesia is not
Xtrordinary
+5
Level 74
Jan 29, 2025
Indonesia is on here.
undeadwarrior
+1
Level 66
Dec 19, 2025
When you say France, you mean New Caledonia, right?
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