英文關鍵字
amazon
america
aquaria
aquarium
black
bred
breeding
cartilaginous
commonly
conservation
demanding
europe
eye
fish
freshwater
genetic
genofond
information
known
laboratory
mearim
motoro
ocellate
orinoco
ornamental
oxygenated
peacock
peacockeye
potamotrygon
rays
river
science
south
species
stingray
subtropical
superorder
tradition
tropical
water