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Can a Blue Green Chromis Live With a Red Knob Sea Star?

~ Possible with caution

Verdict from our compatibility engine, assuming a typical 90-gallon reef tank. Score: 65/100.

Why

  • Schooling species — Blue Green Chromis needs 5+ companions; add at least 4 more
  • Tank borderline (90gal for 120.0gal min)

It can work if…

  • Social concern — review this species' social requirements before adding
  • Schooling species — add at least 4 more companions for best health
  • Upgrade to a larger tank — this species needs more volume

Both species at a glance

Blue Green Chromis

Chromis viridis

Aggression:
peaceful
Min tank:
55 gallons
Reef safe:
safe
Diet:
omnivore

Full Blue Green Chromis care guide →

Red Knob Sea Star

Protoreaster linckii

Aggression:
peaceful
Min tank:
120 gallons
Reef safe:
safe
Diet:
carnivore

Full Red Knob Sea Star care guide →

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