What Are These?

Discussion in 'Freshwater Beginners' started by Neilt, Apr 18, 2018.

  1. NeiltNew MemberMember

    I have seen a couple of them in my aquarium now...freshwater, but they do remind me of something I've seen in saltwater! Can't remember a name, though. They are very tiny, about 0.5-1 cm long and very thin. So far I've seen them on the glass and now on the plants.

    Here's the best shot I could get with my cellphone ;)
  2. qchris87Well Known MemberMember

    Looks like hydra. I'd just pluck it out.

  3. A. RozhinValued MemberMember

    Man, I'd keep a hydra in my tank if I were lucky enough to have one. They're so cool.

  4. NeiltNew MemberMember

    That's the name I couldn't remember! Thanks!
  5. OscarHoyaValued MemberMember

    Why would you take it out (if that's what you meant)? Couldn't it be beneficial?
  6. qchris87Well Known MemberMember

    They multiply pretty quickly, in large enough groups they can kill juvenile fish and juvenile shrimp. I don't see any benefits to keeping them. Some fish eat them, that's about all I can think about.
  7. OscarHoyaValued MemberMember

    Good to know. I know it is not your tank but how did they get there?
  8. A. RozhinValued MemberMember

    They actually don't feed on anything bigger than Daphnia. They also don't "hunt in groups" and even the smallest of fish would be out of the question. It's amazing what you can learn by googling and checking Wikipedia.
  9. qchris87Well Known MemberMember

    While it’s true they feed on smaller creatures like daphnia, they still possess the ability to sting juveniles. A juvenile shrimp walking through a patch of hydra will definitely be stung by hydra with the potential to kill it. They aren’t a big threat to adult shrimp.
  10. FriarThomasIIIWell Known MemberMember

    I have then as a pest in my 10 gallon, and my paradise fish loves to eat them. They are a pest and will kill any young shrimps and fish fry. I hate them and wish they never existed. They don't have any pros to them, just cons
  11. qchris87Well Known MemberMember

    Usually attached to plants that come from infected tanks.
  12. A. RozhinValued MemberMember

    I'm glad to be corrected, always trying to expand my knowledge. That sounds harsh. I guess you can't always go by Wikipedia. :) The hydra in mythology was sort of a rough customer, also, so I guess it makes sense.

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