1. plural of clupeid; fish of the family Clupeidae, which includes herrings, sardines, anchovies, and pilchards
Usage: technical/scientific; plural form

Examples

• Clupeids are among the most commercially important fish species worldwide.
• The ocean's clupeids form massive schools that migrate seasonally.
• Many clupeids are rich in omega-3 fatty acids.
• Fisheries depend heavily on sustainable management of clupeid populations.
• Clupeids play a crucial role in marine food webs as prey for larger fish.