Definition
A haplosporidian refers to a member of the Haplosporidia class, a group of parasitic protozoa that primarily infect marine invertebrates, such as mollusks and crustaceans. These parasites have a simple spore structure, lacking complex internal components. Think of a haplosporidian as a tiny, sneaky intruder targeting marine shellfish. Their infection can devastate oyster beds, similar to a digital virus corrupting a computer system. Research is ongoing to understand their life cycle and develop effective control measures.