Can a Pencil Urchin Live With a Porcupine Puffer?
✗ Not recommended in most tanksVerdict from our compatibility engine, assuming a typical 90-gallon reef tank. Score: 0/100.
Why
- Reef safety hard block: Not reef-safe — Pencil Urchin will damage coral/inverts
- Species conflict: Known conflict: Porcupine puffer will eat most inverts — not reef-safe
- Reef safety hard block: Not reef-safe — Porcupine Puffer will damage coral/inverts
It can work if…
- Tank is nearing capacity — consider removing a resident before adding this one
- Reef safety concern — relocate or rehome before adding to a reef tank
- Known incompatibility — these species are documented to conflict
- Upgrade to a larger tank — this species needs more volume
Both species at a glance
Pencil Urchin
Eucidaris tribuloides
- Aggression:
- peaceful
- Min tank:
- 30 gallons
- Reef safe:
- unsafe
- Diet:
- omnivore
Porcupine Puffer
Diodon holocanthus
- Aggression:
- semi-aggressive
- Min tank:
- 180 gallons
- Reef safe:
- unsafe
- Diet:
- omnivore