Pubic Louse (commonly known as Crabs)

Found exclusively on human hosts, primarily in the pubic and perianal regions, but can occasionally be found on other coarse body hair such as eyelashes, eyebrows, beard, or armpit hair.

Obligate ectoparasites that feed exclusively on human blood several times a day.

They are sedentary and move very little throughout their lives, using specialized claws to grip coarse hair. They go through three stages: nit (egg), nymph, and adult. They cannot jump or fly and are usually transmitted through close physical or sexual contact.

Risks include intense itching (pruritus) caused by an allergic reaction to their saliva, and secondary skin infections from scratching. They are not known to transmit systemic diseases. There are no ecological benefits to humans; they are strictly parasitic pests.