However their colors are warning signals indicating special capabilities to deter predators , such as bioactive chemical defense .
Most phyllidiids appear in their natural context during day time in a conspicuous way and are thus exposed to their predators .
Phyllidiids ' colors are warning signals indicating special capabilities to deter predators , such as bioactive chemical defense .
Most phyllidiids appear in their natural context during day time in a conspicuous way and are thus exposed to their predators .