The vast majority of fish examined histologically showed myodegeneration, epithelialisation,
inflammation, and fibrosis of the tag entry site. These are all normal wound repair responses to tag
entry wounds (Mawdesley-Thomas & Buke 1973, Roberts et al. 1973b). Recovering of the tag sinus
by epithelium occurs quite quickly in fish, a process that minimises the chances of secondary infection
(Roberts 1989).