Tapeworm (likely a segment or Proglottid from a Dipylidium caninum)

Intestinal tract of mammals (primarily dogs and cats); larvae develop in fleas

Absorbs nutrients directly through their skin (tegument) from the host's digestive contents; they lack a digestive system of their own.

Parasitic lifecycle. Adults live in the intestines. Gravid proglottids (egg-filled sacs) detach and pass out via feces or crawl out of the anus, often wriggling around which causes itching. They dry out to look like sesame_seeds.

Risks: Causes discomfort, anal itching (scooting), and mild gastrointestinal issues in pets. Zoonotic potential: humans (usually children) can become infected if they accidentally ingest an infected flea, though serious disease is rare.