Some shots for reference:
Yellow shrimp:
Snowball shrimp:
Dark green shrimp:
Tiger shrimp:
Blue Pearl shrimp:
Blue/black shrimp:
Pomacea bridgesii and cherry shrimp:
Olive nerites:
A couple of my tanks, pardon the picture quality:
Yellow shrimp:
Snowball shrimp:
Dark green shrimp:
Tiger shrimp:
Blue Pearl shrimp:
Blue/black shrimp:
Pomacea bridgesii and cherry shrimp:
Olive nerites:
A couple of my tanks, pardon the picture quality: