Blue Squamosa Clam

The Blue Squamosa Clam (Tridacna squamosa) is a peaceful species that is reef-safe, admired for its striking mantle coloration, unique scale-like shell patterns, and impressive size. Its electric blue hues with intricate iridescent markings make it one of the most eye-catching clams available to aquarists.

Unlike fish, clams do not have distinct male/female appearance differences—T. squamosa is a protandric hermaphrodite, meaning individuals can function as male first and later as female. Juveniles typically filter-feed more heavily, while larger adults rely primarily on their symbiotic zooxanthellae for energy, supplemented by filter feeding.

They can reach about 12–16 inches in adulthood and should be housed in aquariums of at least 100 gallons to provide adequate space and stable water quality. A stable sandbed or live rock ledge is preferred, where the clam can attach securely using its byssal threads. Like all Tridacna species, they require strong reef lighting (LED, T5, or metal halide) to support photosynthesis.

Maintain stable water parameters:

Salinity: 1.020–1.025

Temperature: 72–79°F

pH: 8.1–8.4

Calcium: 380–450 ppm

Alkalinity: 8–12 dKH

Magnesium: 1250–1350 ppm

Diet should consist of phytoplankton, marine snow, and dissolved nutrients in the water column. Juveniles benefit from regular live phytoplankton or commercial filter-feeding supplements, while adults thrive mostly from light-driven photosynthesis with occasional supplemental feeding. With proper care, this clam makes a stunning centerpiece in reef aquariums, adding both beauty and natural filtration.

International Aquatics Quarantine & Guarantee: All fish are checked by marine vets, given a formalin bath, and held for 14 days in copper-treated systems. We feed Selcon-soaked food with Kanaplex and Metroplex during quarantine. Unless marked, all livestock comes with our 15-Day Guarantee. You will receive a video of your fish eating before shipment. On request, we also send photos/videos after arrival at IA. Some species are import-to-order (3-10 business days). Many common species are already cleared or near the end of QT.

Several species will be import-to-order and may take anywhere from 3-10 business days to secure. Once your fish is secured, you will be notified, and the quarantine process will then begin.