Black sea urchin
A species of Arbacia Scientific name : Arbacia lixula Genus : Arbacia
Black sea urchin, A species of Arbacia
Botanical name: Arbacia lixula
Genus: Arbacia
Content
Description People often ask
Photo By Albarubescens , used under CC-BY-SA-4.0 /Cropped and compressed from original 
Description
It is a medium-sized sea urchin, characterized by its deep black color and its hemispherical shape. All of its spines are roughly the same size (no "secondary spines"), and worn erected (never dishevelled when in the water). The anus on the top is surrounded by four plates forming an anal valve. The oral face is nearly naked, the mouth being surrounded by soft, dark-greenish skin. This species can be confused with the purple sea urchin Paracentrotus lividus, but the latter is never really black (though often very dark), has more dishevelled spines of many lengths, covers itself with debris, has spines around the mouth and no anal valve, and does not live exposed on the cliffs.
* Disclaimer: The judgment on toxicity and danger is for reference only. We DO NOT GUARANTEE any accuracy of such judgment. Therefore, you SHALL NOT rely on such judgment. It is IMPORTANT TO SEEK PROFESSIONAL ADVICE in advance when necessary.
People often ask
Can black sea urchin kill you?
What does black sea urchin eat?
Scientific Classification
Phylum
Echinoderms Class
Sea urchins Order
Arbacioida Family
Arbaciidae Genus
Arbacia Species
Black sea urchin 
AI fish expert in your pocket
Scan QR code to download
_endoskeleton.jpg){kind=link}