Is it Ich?

[MauiAnglerReef]

so I have a few damsels that I use as feeder fish and one looks like it has ich. Picture is low quality got its a fright white lump above its eye. I don’t want my angler to contract ich so what should I do?

 

[MauiAnglerReef]

It might also just be its scale pattern at its only that one area

 

[Crabs McJones]

white lump won't be ich. ich is small white dots all over the fish's body. a white lump could be an infection of some sort. I'll tag the #fishmedic #fishmedics to take a closer look

 

[MauiAnglerReef]

white lump won't be ich. ich is small white dots all over the fish's body. a white lump could be an infection of some sort. I'll tag the #fishmedic #fishmedics to take a closer look

Ok thanks, is a bacterial issue still an issue if an angler eats it?

 

[Jay Hemdal]

so I have a few damsels that I use as feeder fish and one looks like it has ich. Picture is low quality got its a fright white lump above its eye. I don’t want my angler to contract ich so what should I do?

Using marine fish to feed other marine fish always has some degree of risk, unless the feeder fish are fully quarantined. The old adage of "not feeding freshwater fish to marine fish" isn't really a thing - what IS an issue is feeding fish that are high in thiaminase to any fish, and many freshwater feeders are high in thiaminase.

Thiaminase​

Thiaminase is an enzyme that metabolizes or breaks down thiamine (vitamin B1). In high enough concentrations in food, thiaminase will create thiamin deficient diets in fish. This is a common, yet serious problem with predatory fish that are fed feeder goldfish, as goldfish are very high in thiaminase. Lionfish, piranha and oscars cichlids were commonly fed all-goldfish diets by home aquarists. Health issues in their fish were then very common; fatty liver disease in lionfish, pica in piranha (where they eat each other to try to get more thiamin) and HLLE in oscars. Fresh seafoods known to be high in thiaminase can be supplemented with thiamin. Conversely, aquarists can avoid feeding fresh seafoods known to be high in thiaminase.

The actual impact of thiaminase on a fish’s diet depends on three factors:
What proportion of thiaminase-containing food is fed to the fish
What the concentration of thiaminase is in the food item
How much vitamin B1 is already present in the food


The following is a partial list of seafoods that contain and don’t contain thiaminase:


Species high in thiaminase

Anchovy (Engraulis sp.)

Atlantic herring (Clupea harengus)

Capelin (Mallotus villosus)

Carp (Cyprinus carpio)

Clams (family Veneridae)

Goldfish (Carassius auratus)

Lobster (Homarus americanus)

Menhaden (Brevoortia spp.)

Minnows (Cyprinids)

Mussels (Mytilus spp.)

Rainbow smelt (Osmerus mordax)

Sardine (Harengula spp.)

Scallops (Pecten spp.)

Shrimp and prawns (various species)

Skipjack tuna (Katsuwonus pelamis)

White bass (Morone chrysops)

Yellowfin tuna (Neothunnus macropterus)



Species lower in thiaminase

Atlantic cod (Gadus morhua)

Atlantic hake (Merluccius bilinearis)

Atlantic halibut (Hippoglossus hippoglossus)

Atlantic mackerel (Scomber scombrus)

Atlantic salmon (Salmo salar)

Brown trout (Salmo trutta)

Catfish (Ictalurus and related spp)

Cisco (Coregonus spp.)

Coho salmon (Oncorhynchus kisutch)

Flounder / sole (Pleuronectes and related spp.)

Haddock (Melanogrammus aeglefinus)

Hake (Urophycis spp)

Lake trout (Salvelinus namaycush)

Mullet (Mugilidae spp)

Poecilids (Guppies, platies, mollies)

Pollock/Pollack (Pollachius spp.)

Rainbow trout (Oncorhynchus mykiss)

Tilapia (Oreochromis spp)

Worms (Lumbricus spp)

 

[MauiAnglerReef]

so I have a few damsels that I use as feeder fish and one looks like it has ich. Picture is low quality got its a fright white lump above its eye. I don’t want my angler to contract ich so what should I do?

Using marine fish to feed other marine fish always has some degree of risk, unless the feeder fish are fully quarantined. The old adage of "not feeding freshwater fish to marine fish" isn't really a thing - what IS an issue is feeding fish that are high in thiaminase to any fish, and many freshwater feeders are high in thiaminase.

Thiaminase​

Thiaminase is an enzyme that metabolizes or breaks down thiamine (vitamin B1). In high enough concentrations in food, thiaminase will create thiamin deficient diets in fish. This is a common, yet serious problem with predatory fish that are fed feeder goldfish, as goldfish are very high in thiaminase. Lionfish, piranha and oscars cichlids were commonly fed all-goldfish diets by home aquarists. Health issues in their fish were then very common; fatty liver disease in lionfish, pica in piranha (where they eat each other to try to get more thiamin) and HLLE in oscars. Fresh seafoods known to be high in thiaminase can be supplemented with thiamin. Conversely, aquarists can avoid feeding fresh seafoods known to be high in thiaminase.

The actual impact of thiaminase on a fish’s diet depends on three factors:
What proportion of thiaminase-containing food is fed to the fish
What the concentration of thiaminase is in the food item
How much vitamin B1 is already present in the food


The following is a partial list of seafoods that contain and don’t contain thiaminase:


Species high in thiaminase

Anchovy (Engraulis sp.)

Atlantic herring (Clupea harengus)

Capelin (Mallotus villosus)

Carp (Cyprinus carpio)

Clams (family Veneridae)

Goldfish (Carassius auratus)

Lobster (Homarus americanus)

Menhaden (Brevoortia spp.)

Minnows (Cyprinids)

Mussels (Mytilus spp.)

Rainbow smelt (Osmerus mordax)

Sardine (Harengula spp.)

Scallops (Pecten spp.)

Shrimp and prawns (various species)

Skipjack tuna (Katsuwonus pelamis)

White bass (Morone chrysops)

Yellowfin tuna (Neothunnus macropterus)



Species lower in thiaminase

Atlantic cod (Gadus morhua)

Atlantic hake (Merluccius bilinearis)

Atlantic halibut (Hippoglossus hippoglossus)

Atlantic mackerel (Scomber scombrus)

Atlantic salmon (Salmo salar)

Brown trout (Salmo trutta)

Catfish (Ictalurus and related spp)

Cisco (Coregonus spp.)

Coho salmon (Oncorhynchus kisutch)

Flounder / sole (Pleuronectes and related spp.)

Haddock (Melanogrammus aeglefinus)

Hake (Urophycis spp)

Lake trout (Salvelinus namaycush)

Mullet (Mugilidae spp)

Poecilids (Guppies, platies, mollies)

Pollock/Pollack (Pollachius spp.)

Rainbow trout (Oncorhynchus mykiss)

Tilapia (Oreochromis spp)

Worms (Lumbricus spp)

The issue is he doesn’t like guppies and other freshwater feeder, he completely rejects them for some reason. Damsels are my only option

 

[MauiAnglerReef]

so I have a few damsels that I use as feeder fish and one looks like it has ich. Picture is low quality got its a fright white lump above its eye. I don’t want my angler to contract ich so what should I do?

Using marine fish to feed other marine fish always has some degree of risk, unless the feeder fish are fully quarantined. The old adage of "not feeding freshwater fish to marine fish" isn't really a thing - what IS an issue is feeding fish that are high in thiaminase to any fish, and many freshwater feeders are high in thiaminase.

Thiaminase​

Thiaminase is an enzyme that metabolizes or breaks down thiamine (vitamin B1). In high enough concentrations in food, thiaminase will create thiamin deficient diets in fish. This is a common, yet serious problem with predatory fish that are fed feeder goldfish, as goldfish are very high in thiaminase. Lionfish, piranha and oscars cichlids were commonly fed all-goldfish diets by home aquarists. Health issues in their fish were then very common; fatty liver disease in lionfish, pica in piranha (where they eat each other to try to get more thiamin) and HLLE in oscars. Fresh seafoods known to be high in thiaminase can be supplemented with thiamin. Conversely, aquarists can avoid feeding fresh seafoods known to be high in thiaminase.

The actual impact of thiaminase on a fish’s diet depends on three factors:
What proportion of thiaminase-containing food is fed to the fish
What the concentration of thiaminase is in the food item
How much vitamin B1 is already present in the food


The following is a partial list of seafoods that contain and don’t contain thiaminase:


Species high in thiaminase

Anchovy (Engraulis sp.)

Atlantic herring (Clupea harengus)

Capelin (Mallotus villosus)

Carp (Cyprinus carpio)

Clams (family Veneridae)

Goldfish (Carassius auratus)

Lobster (Homarus americanus)

Menhaden (Brevoortia spp.)

Minnows (Cyprinids)

Mussels (Mytilus spp.)

Rainbow smelt (Osmerus mordax)

Sardine (Harengula spp.)

Scallops (Pecten spp.)

Shrimp and prawns (various species)

Skipjack tuna (Katsuwonus pelamis)

White bass (Morone chrysops)

Yellowfin tuna (Neothunnus macropterus)



Species lower in thiaminase

Atlantic cod (Gadus morhua)

Atlantic hake (Merluccius bilinearis)

Atlantic halibut (Hippoglossus hippoglossus)

Atlantic mackerel (Scomber scombrus)

Atlantic salmon (Salmo salar)

Brown trout (Salmo trutta)

Catfish (Ictalurus and related spp)

Cisco (Coregonus spp.)

Coho salmon (Oncorhynchus kisutch)

Flounder / sole (Pleuronectes and related spp.)

Haddock (Melanogrammus aeglefinus)

Hake (Urophycis spp)

Lake trout (Salvelinus namaycush)

Mullet (Mugilidae spp)

Poecilids (Guppies, platies, mollies)

Pollock/Pollack (Pollachius spp.)

Rainbow trout (Oncorhynchus mykiss)

Tilapia (Oreochromis spp)

Worms (Lumbricus spp)

The issue is he doesn’t like guppies and other freshwater feeder, he completely rejects them for some reason. Damsels are my only option

We used to feed him a lot of guppies, but I think he got sick of them

 

[Jay Hemdal]

We used to feed him a lot of guppies, but I think he got sick of them

That can happen. Have you tried black mollies?

 

[MauiAnglerReef]

We used to feed him a lot of guppies, but I think he got sick of them

That can happen. Have you tried black mollies?

Not yet but I have a pond with a variety of different guppies in different colors, so idk what to do

 

[Jay Hemdal]

Not yet but I have a pond with a variety of different guppies in different colors, so idk what to do

Two other options - local reef fish or pond raised tilapia? Less disease risk than damsels from a pet store.