Fish diseases
By Peter Petersen
Fish louse (Argulus sp.) taken from the freshwater fish: Trahira (Hoplias malabaricus).
Here the Fish louse (Argulus sp.) still on the Trahira (Hoplias malabaricus).
This is the Ich or white spot disease (Ichthyophthirius multifiliis) seen under a microscope. This was scrabed of a Madagascar cichlid (Ptychochromis grandidieri)