Big Momma, American Samoa

Its true name is “Fale Bommie” (in honor of Fale Tuilagi who discovered it), but “Big Momma” is the nickname local divers have given this huge Porites coral, which may well be the largest coral on the planet. It is 41 metres in circumference and 7 metres high. This type of ‪‎coral grows very slowly, as little as 1 centimetre a year, which means that this coral is over 500 years old! Big Momma is located in the aptly named “Valley of the Giants” within the National Marine Sanctuary of American Samoa. Image collect by Catlin Seaview Survey.

Can be seen here in Google Oceans.