Which parasite is most commonly associated with raw or undercooked fish in cats?

The correct answer is Dipylidium caninum, which is commonly associated with cats consuming raw or undercooked fish. This parasite, also known as the flea tapeworm, is often transmitted when a cat ingests infected fleas or the intermediate host, which can sometimes include fish affected by the parasite's lifecycle. While cats may primarily contract Dipylidium caninum through flea ingestion, cases related to consuming raw fish can occur, especially in environments where fish are a regular part of a cat's diet.

Understanding the lifecycle and transmission methods is crucial for identifying this parasite's risks accurately. This reinforces the necessity of preventing fleas on pets and being cautious about feeding them raw fish, as it may introduce various risks, including this tapeworm.