plural noun
Sub·​brach·​i·​a·​les | \ˌsəbˌbrakēˈā(ˌ)lēz\

Definition of Subbrachiales 

in some especially former classifications

: a division of soft-finned fishes having the ventral fins beneath or nearly beneath the pectoral fins

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History and Etymology for Subbrachiales

New Latin, from plural of subbrachialis subbrachial

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