| Fish Pathogens

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reddish

Fungal lesion on largescale sucker

Fungal lesion on largescale sucker

Myxobolus squamalis

Red spots on belly of rainbow trout caused by the myxozoan parasite Myxobolus squamalis

Non-pathogen related...

Ceratonova shasta

Fish liver showing dark red lesions due to C. shasta infection.

Ceratonova shasta

Fish intestine showing swelling and pale lesions due to C. shasta infection

Hemorrhaged swim bladder caused by IHN virus

Aeromonas salmonicid...

Red patches caused by Aeromonas infection.

Copepods (sea lice)

Sealice and feeding scars on skin of trout.

Copepods (sea lice)

Sealice and feeding scars on skin of salmon.

Tumor-like lumps

Tumors on lips of adult spring Chinook salmon.

Bacterial lesion on side of trout.

Strawberry disease

Red patches known as "strawberry disease".

Aeromonas salmonicid...

Red patches (furunculosis) caused by Aeromonas infection.

Bacterial lesion on tail of carp.

Large carp with lesion on tail.

Goldfish displaying red patch on face due to bacterial infection.

Goldfish displaying red patch on face due to bacterial infection.

Ceratonova shasta

Fish liver showing areas of necrosis and damage due to systemic Ceratomyxa shasta infection.