Q: We have a koi and goldfish pond with a few plants. We have heard we should add salt, and we are unclear about how much is OK, what it does and if it will hurt the plants. A: Let’s cover the reason ...

A small, salt-water pest could cause a big crisis for Big Apple lox-aholics. The half-inch-long sea louse — Lepeophtheirus salmonis — is killing off huge numbers of juvenile wild salmon in Europe and ...

More than 90% of popular freshwater fish in Southern California are carrying human-infecting parasites, researchers say. This poses a significant danger for those who like to eat freshly caught ...