How do you know if a fish is sick?

We've already established that fish get sick, so how can you recognize when something is wrong? Signs of illness can be broken down into two categories: physical and behavioral. Physical These indicators of illness can be very easy to spot. Physical signs of disease include: Changes in colorationBumps/lumpsAsymmetrical body shapeMisshapen finsWoundsUlcersEtc, etc etc Most of [...]