What are the signs of Largemouth Bass Virus?

Most bass infected with LMBV will appear completely normal. In those cases where the virus has triggered disease, however, dying fish will be near the surface and have trouble swimming and remaining upright. That's because LMBV appears to attack the swim bladder, causing bass to lose their equilibrium. Diseased fish might also appear bloated.

Adult bass of two pounds and more seem to be the most susceptible to disease, or at least the most visible.