Fluted giant clam

Tridacna squamosa

"Tridacna squamosa", known commonly as the fluted giant clam and scaly clam, is one of a number of large clam species native to the shallow coral reefs of the South Pacific and Indian Oceans.
Fluted giant clam - Tridacna squamosa https://meilin5giantclam.wordpress.com/2016/10/20/is-this-i-think-it-is-no-wait-what/
https://www.tidalgardens.com/blog/tridacna-clams-reef-aquariums-maxima-squamosa-crocea-derasa-gigas-clams/ Fall,Fluted giant clam,Geotagged,Indonesia,Tridacna squamosa

Appearance

It is distinguished by the large, leaf-like fluted edges on its shell called 'scutes' and a byssal opening that is small compared to those of other members of the Tridacnidae family. Normal coloration of the mantle ranges from browns and purples to greens and yellows arranged in elongated linear or spot-like patterns. "Tridacna squamosa" grows to 40 centimetres across.

Sessile in adulthood, the clam's mantle tissues act as a habitat for the symbiotic single-celled dinoflagellate algae from which it gets a major portion of its nutrition. By day, the clam spreads out its mantle tissue so that the algae receive the sunlight they need to photosynthesize.
Scaly Clam (Tridacna squamosa) Diver's Lodge House Reef, Lembeh. Fluted giant clam,Geotagged,Indonesia,Spring,Tridacna squamosa

Status

The IUCN lists this clam as lower risk, but dependent on conservation efforts.

References:

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Status: Unknown
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Taxonomy
KingdomAnimalia
DivisionMollusca
ClassBivalvia
OrderVeneroida
FamilyTridacnidae
GenusTridacna
SpeciesT. squamosa