I am no expert here, but I have seen two types of emeralds, ones with very small claws and ones with larger claws. It is my uninformed opinion that the small-clawed ones would have trouble taking out a fish. I don't know whether this is a male/female difference or if it's a different species or what. I feel that these two types may be responsible for the different experiences people have with them. perhaps we should do a survey about these, since I have no research whatsoever to back up what I'm saying.
54g all-glass bowfront corner planted FW
Red tiger lilly, Rotala Indica, Sagittaria Subulata, Micro Sword, Cardinal Plant
Fluorite Black sand and gravel