oxygen
fisheries
taste
shoaling
pumping
blood
contractions
ears
larvae
motion
vision
circulatory
pulling
swimming
carbon dioxide
fishing
consciousness
eggs
chemoreceptors
fear
paired
filaments
body
jaws
mermaid
mouths
smell
synchronising
scales
backbone
schooling
ichthys
senses
vibrations
dorsal fins
lateral lines
maps
gills
muscles
aquatic
merman
pain
curves
openings
ammonia
skin
fish
landmarks
prey
school
heart
fishery
force
anal fin
orient
tail fin
mermaids
symbols
synchromised
currents
water
fins
shoal
/pos