there are two basic flavours of triggers. upturned mouthed trigs and down turned mouthed trigs. The upturned mouthed trigs like blue throats, nigers, crosshatch, pinktails, etc specialize in planktonic feeding and are as peaceful as a trigger can be. The downturned mouthed trigs like clowns, undulated etc specialize in benthic feeding and are usually much more aggressive and considered less reef safe.
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