noun
black-striped mussel (Mytilopsis sallei)
A specific marine bivalve species; primarily used in biological contexts.
イガイダマシは外来種として日本の沿岸で見られることがある。
The black-striped mussel is sometimes found along the Japanese coast as an invasive species.
The name likely derives from イガイ (mussel) and 騙し (deceiving), suggesting a resemblance to true mussels. The exact origin is uncertain.