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Please help ID this unknown creature
#1
Hello there,

I have had my Betta living in a 5.5 gallon tank since early March.

Last night I noticed him attacking something, which then crawled out of the water an onto an ornament/

Here is a picture of the creature, you can see him to towards the middle of the picture, slightly to the right....

https://www.dropbox.com/s/owje5r1vmh7icv...l.jpg?dl=0
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#2
Hi and welcome to the forum.

It looks like an insect larvae of some type. Others will be along soon that can confirm if I'm right or not. If you can I would remove it from the tank.
500L Sooperhooge Goldfish tank Smile
12L The Startank Aquaprise rofl 2 Batman Snails, 2 Nerite snails.
200L The Barbarium….STILL cycling!
20L Nano Marine.....stocking in progress!
[-] The following 1 user Likes Cheltgirl's post:
  • Huscarl
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#3
Insect larvae? What kind of insect larvae could be so large? Its around 1.5 cms long, do mosquito larvae get that large? Perhaps it is about to turn?

I also have an infestation of brown snails that I have been removing. 

I believe these invaders arrived due to me not washing my plants after buying them from the aquatic shop.
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#4
Plants are the most common way uninvited guests arrive in tanks.

I don't know enough to be able to identify a species of insect, over the next day or so the clever members will be on and hopefully they can shed some more light.

If the tank is open topped there's the chance a critter got in and left eggs behind if it didn't arrive with the plants.

Pest snails can be a pain. Keep up with the manual removal and you'll get there Smile
500L Sooperhooge Goldfish tank Smile
12L The Startank Aquaprise rofl 2 Batman Snails, 2 Nerite snails.
200L The Barbarium….STILL cycling!
20L Nano Marine.....stocking in progress!
[-] The following 1 user Likes Cheltgirl's post:
  • Huscarl
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Thanks given by: Huscarl
#5
Looks like a dragonfly larvae. Those things are mean and will kill smaller fish.

https://www.warrenphotographic.co.uk/236...nfly-nymph

The Dave channel on Youtube has some video of one catching fish. I'd get it out of there.
[Image: 2Tsph5y]
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  • Huscarl
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#6
If it is a dragonfly nymph. And is out of the water, then it is no longer a danger to anything. It is getting ready to moult and take to the air.
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