動物福祉
underwater
aqua pets
aquatic
aquatic environment
bunch
captivity
close quarters
confined
confinement
conservation
containment
crowded
ecosystem
enclosed
environmental impact
environmental issues
finned creatures
fish
fish behavior
fish tank
group
limited
many
marine animals
marine conservation
marine life
marine pets
marine species
market
non terrestrial
numerous
ocean life
pack
piscine
restricted
schools
sea creatures
shoal
small area
space
swim
swim together
swimming
underwater world