The inhalant siphon(large hole) is made up of an elongated opening. Fringing tentacles sometimes surround this opening. The tentacles will strain out large particles. The exhalent siphon forms a raised cone, which can be found further along the mantle from the inhalant siphon. Water leaves the clam's body cavity through the exhalant siphon after being filtered by the gills.
So does the squamosa really have a pink ring to it? I saw that in one of your other pics, and figured it was the actinics or something. Either way, it's a very beautiful clam!
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