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Maxima clam (Tridacna maxima)
AI illustration, not an ID reference

Maxima clam

Tridacna maxima

InvertebratesSaltwater

Care level
Demanding
Temperament
Peaceful
Reef safe
Yes
Recommended tank
250 L
Maximum size
30 cm
Temperature
24–27 °C
pH
8–8.4
Light
High
Flow
Medium
Diet
Photosynthetic

Care at a glance

The maxima clam has a mantle edge in electric blue, turquoise or golden brown with a velvety pattern, which makes it one of the showpieces of a reef tank. Like corals it lives in symbiosis with algae in its tissue, which produce sugars for it from light.

It therefore needs strong lighting and should be placed high in the tank or on rock, not in the sand; its foot must be able to attach to a hard surface. Keep calcium, alkalinity and magnesium stable at reef levels and watch out for wrasses and puffers, which may pick at its mantle.

Good to know

  • Needs a mature, stable tank
  • Filter feeder — needs fine suspended food

Related species

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Values are mainstream hobbyist guidance, not gospel — always watch what your own animals need.