Hydroids harmful to fish?

gramma royale · 08-31-2001, 11:16 AM

Woke up this morning and saw 8 hydroids sticking to the glass!!!

I went through some of the old posts to get some info off of them, but I'd like to know some more. Mainly, do they attack fish, and how large can they get in a 29 gallon? Someone said that they can't harm fish because fish move to fast, but what about when they're asleep? Thanks.

hcp28 · 08-31-2001, 01:40 PM

Hydroids are notoriously known to prey on fish fry or smaller prey, I really don't think you'd have anything to worry about when it comes to your fish. Your hydroids are probably surviving off of small coepods or something of the sort floating around in your system that you are not aware of. I think as long as your not thinking of breeding your fish then you should be fine with a few, you can always remove them by hand when you see them as well. It really is a pain toget rid of them, so you may want to see if you can get a fish that will eat them for you. I don't know of any saltwater fish that eat them, but maybe a copperband butterfly will. HTH

Henry

AquaSeahorse · 08-31-2001, 10:45 PM

He is right ~ Hydroids are generally not harmful to fish , however they are harmful to the smaller breeds of seahorses. I have heard that peppermint shrimp will eat them ,however I am not certain on how accurate that is...

08-31-2001, 11:16 AM	#1
gramma royale Tenant Join Date: Jul 2001 Location: Concord, CA Posts: 90	Hydroids harmful to fish? Woke up this morning and saw 8 hydroids sticking to the glass!!! I went through some of the old posts to get some info off of them, but I'd like to know some more. Mainly, do they attack fish, and how large can they get in a 29 gallon? Someone said that they can't harm fish because fish move to fast, but what about when they're asleep? Thanks. __________________ "Therefore in fierce tempest is he coming, in thunder and in earthquake, like a Jove."

08-31-2001, 01:40 PM	#2
hcp28 Evil Czar Join Date: Sep 2000 Location: New York, NY Posts: 1,001	Hydroids are notoriously known to prey on fish fry or smaller prey, I really don't think you'd have anything to worry about when it comes to your fish. Your hydroids are probably surviving off of small coepods or something of the sort floating around in your system that you are not aware of. I think as long as your not thinking of breeding your fish then you should be fine with a few, you can always remove them by hand when you see them as well. It really is a pain toget rid of them, so you may want to see if you can get a fish that will eat them for you. I don't know of any saltwater fish that eat them, but maybe a copperband butterfly will. HTH Henry __________________ Tragedy is when I cut my finger. Comedy is when you fall down an open manhole and die. -Mel Brooks

08-31-2001, 10:45 PM	#3
AquaSeahorse Council Join Date: Aug 2000 Location: Owensboro Kentucky Posts: 461	He is right ~ Hydroids are generally not harmful to fish , however they are harmful to the smaller breeds of seahorses. I have heard that peppermint shrimp will eat them ,however I am not certain on how accurate that is... __________________ - Eric - -Visit Eric's Seahorse Ranch

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