An acorn barnacle
A species of Barnacle Scientific name : Balanus crenatus Genus : Barnacle
An acorn barnacle, A species of Barnacle
Botanical name: Balanus crenatus
Genus: Barnacle
Content
Description
Photo By Christoph Noever/Universitet i Bergen , used under CC-BY-4.0 /Cropped and compressed from original 
Description
The shell of B. crenatus is made of six calcareous plates and grows up to 25 millimetres (0.98 in) across. The upper edge of the plates are toothed and the shell is often tilted to one side. The opercular aperture is diamond shaped and protected by two further plates which can slide across when the animal is not feeding.
* 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.
Photo By Christoph Noever/Universitet i Bergen , used under CC-BY-4.0 /Cropped and compressed from original 
Scientific Classification
Phylum
Arthropods Class
Maxillopoda Order
Sessile barnacles Family
Balanidae Genus
Barnacle Species
An acorn barnacle 
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