As a fish doctor what will you do if you observe significant degrees of hypopigmentation or pigmentation loss? Which clinical tests are recommended?

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Andrew Paul McKenzie Pegman

Skin scraping to check for parasites and fungi and culture and sensitivity for possible bacterial infection :)

Svein Hallbjørn Steien

Contact your/the farms fishfeed company to check out if the rainbow trout are fed with the optimal feed reg. size etc. Analyzes of asta in fillet. Ask the fishfeed company what to be done reg feed - increase pigment content in the feed.

You should also check out if the water quality is OK

Madhav Bhilave

Pathogenic infection &/or exposure to pollutants could be one of the culprit in loss of pigmentation in fishes