species 427 observations
Needle-spined Urchin
Echinostrephus aciculatus
Field notes
Echinostrephus aciculatus is a species of sea urchin belonging to the family Echinometridae first documented by Alexander Emmanuel Rodolphe Agassiz in 1863.
Read more on WikipediaRange
Greener is more native, amber more introduced; paler is less certain. How this was decided