Pubic louse (also known as Crab louse)

Exclusively on the human body, primarily in the pubic hair or coarse hair regions like eyelashes or armpits.

Obligate ectoparasite; feeds exclusively on human blood several times a day.

They are sedentary and move very slowly; they cling to hair shafts using crab-like claws and cannot jump or fly. They lay eggs (nits) on the hair shaft.

Risks include intense itching (pruritus) due to an allergic reaction to their saliva, and skin discoloration known as maculae caeruleae. They are typically spread through close physical or sexual contact and require medical treatment to eradicate.