balanus (barnacles)
Post on 14-Jul-2015
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Balanus (Barnacles)Sessile
Filter-feeders
Encrusters
Shells composed of calcite
Most are hermaphroditic
Balanus (Barnacles)Representative species:
1. Balanus glandula (Common acorn barnacle)
-rugged white shell with a base that is not much wider than the top
-shallow rocky area
Balanus (Barnacles)
2. Balanus crenatus(Crenate barnacle)
-flat & white
-attaches to discarded bottles and other debris
Balanus (Barnacles)3. Balanus nubilus (Giant barnacle)
-Rugged white shell with two inner plates that close
-Can grow individually, but often seen in dense clusters growing on top of one another.
Balanus (Barnacles)4. Pollicipes polymerus(Gooseneck barnacle)
-dense colonies on shallow, current swept reefs and walls
-exterior shell covered with distinctive white plates
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