Can a Pencil Urchin Live With a Yellow Wrasse?
✗ 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
- Known conflict: Many Halichoeres wrasses pick at small ornamental shrimp and snails
It can work if…
- Reef safety concern — relocate or rehome before adding to a reef tank
- Known incompatibility — these species are documented to conflict
Both species at a glance
Pencil Urchin
Eucidaris tribuloides
- Aggression:
- peaceful
- Min tank:
- 30 gallons
- Reef safe:
- unsafe
- Diet:
- omnivore