The Crimson Snapper (Small Mouth Nannygai) has a deep oval elongate body, something similar to the Red Emperor which it is often confused with. The colouration is a beautiful bright scarlet. The large Mouth Nannygai lacks the darker shades of the Red Emperor, also the Large Mouth Nannygai develops a black saddle over its tail base, the Red Emperor never does. The Small Mouth Nannygai is similar but a distinguishable by its much smaller mouth.
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