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Veronica M
Veronica M asked in PetsFish · 1 decade ago

Live daphnia from frozen?

I feed my fish the frozen cubes of daphnia, and now one of my tanks appears to have a population of live ones swimming around and walking on the [fake] plant. Have anyone heard of frozen daphnia able to reproduce after being thawed? I always assumed they were dead...

Update:

thanks for the replies, I didn't think this was possible.

I felt a bit stupid asking this seeing as I'm a zoologist.

i have no live plants in this aquarium (Oscar lives in it).

I will bring a water sample to my lab tomorrow and look at the little buggers under the scope to identify them for sure.

I haven't introduced any new fish, plants, decorations or anything. Only water changes. I'm perplexed.

Update 2:

EDIT: I brought them to the lab and looked under the microscope and identified them!

They are Ostracods (seed shrimp). Not sure how they got it, but they're harmless so I'm not concerned.

Thanks again for the help.

3 Answers

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  • Coral Reef Forum
    Lv 7
    1 decade ago
    Favorite Answer

    zero chance. frozen foods are 100% dead.

    it might be other micro organism prehaps if you recently added new live plants etc.

  • grodhi96792
    Lv 4
    1 decade ago

    There will probably be a lot of disagreement with me on what I'm about to suggest but, I've had a bloom of daphnia from a dry stream bed that flowed after nearly 15 yrs of dryness.

    There's always a chance that a female had eggs at the time of flash freezing and the eggs were dormant until introduced into the aquarium. After all in nature they survive harsh winter conditions and reappear after the thaw don't they?

  • Anonymous
    1 decade ago

    I agree with BCaquatics, frozen Daphnia will be 100% dead. The only other possibilities are another organism or perhaps you have introduced live Daphnia to the tank via live plants.

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