← Browse all species

Can a Longhorn Cowfish Live With a Pajama Cardinalfish?

✗ Not recommended in most tanks

Verdict from our compatibility engine, assuming a typical 90-gallon reef tank. Score: 0/100.

Why

  • Size capacity hard block: Tank far too small (90gal for 250.0gal min)
  • Tank heavily stocked (283%) — over recommended load

It can work if…

  • Upgrade to a larger tank — this species needs more volume
  • Tank is nearing capacity — consider removing a resident before adding this one
  • Social concern — review this species' social requirements before adding

Both species at a glance

Longhorn Cowfish

Lactoria cornuta

Aggression:
peaceful
Min tank:
250 gallons
Reef safe:
caution
Diet:
omnivore

Full Longhorn Cowfish care guide →

Pajama Cardinalfish

Sphaeramia nematoptera

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

Full Pajama Cardinalfish care guide →

Related compatibility checks

See if they fit YOUR tank →