17. Otters
Otters are playful and endearing, but their needs are far too complex for most private homes.
They require large aquatic environments and thrive in social groups, which are impossible to replicate in captivity.
When kept as pets, otters often suffer from stress, boredom, and health problems due to inadequate care and isolation.
As World Animal Protection highlights, the otter pet trade is not only cruel but also detrimental to wild populations and individual animal welfare.