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Clupeiformes: Recessus lateralis present (part of the otophysic connection in which various sensory canals merge within a chamber in the otic region of the neurocranium, not known from any other group); parasphenoid teeth absent; no large foramen on the anterior ceratohyal; parietals separated by the supraoccipital; no leptocephalous larvae. Most are plankton feeders, with long and sometimes very numerous gill rakers that serve as straining devices.

Families in this order: