ID this insect

wei · 19-04-2008, 01:46 AM

there have been deaths occurring every other day in my shrimp tank and last night spotted this insect hiding in my 1.5ft shrimp tank. No choice got to decom the whole tank to seek it out...

Any one came across this insect before, and will it harm shrimps?? It looks like a cockcoach...maybe aquatic version of it?

19-04-2008, 02:41 AM

bro. picture not so clear. i assume that it is a water beetle and its neutral to ur shrimps.

any experts who can identify?

nasty12 · 19-04-2008, 03:10 AM

water boat man?
the 1 which eat tadpoles?

luigi545 · 19-04-2008, 03:32 AM

Don't think it's a water boatman, more like a dragonfly nymph to me after doing a search and compared.

Water boatman

Link here

Dragonfly nymph

Link here

nasty12 · 19-04-2008, 11:24 AM

hmm but u see the head section.. abit different..

900801 · 19-04-2008, 12:21 PM

water beetle?

wei · 19-04-2008, 12:22 PM

looks more like dragonfly nymph but from top view down, the body is rounder as compared to the pic(posted by luigi), also the hind legs are longer....from side view (the first pic i attached), the head part and front legs looks a bit like praying mantis...

realised also that its probably good not to make the tank too dense with vegetation, especially small shrimp tank...

19-04-2008, 12:50 PM

Quote:

Originally Posted by wei

looks more like dragonfly nymph but from top view down, the body is rounder as compared to the pic(posted by luigi), also the hind legs are longer....from side view (the first pic i attached), the head part and front legs looks a bit like praying mantis...

realised also that its probably good not to make the tank too dense with vegetation, especially small shrimp tank...

i think its a Dragonfly nymph... it came from the plants you juz bought... i kana once.. scare liao... now i buy plants from shop... i left it over nite in a empty tank fill with tap water or put it in salt water then wash it away quickly...it kill away those slug things...

wei · 19-04-2008, 01:10 PM

Quote:

Originally Posted by Ang Kong Siao

i think its a Dragonfly nymph... it came from the plants you juz bought... i kana once.. scare liao... now i buy plants from shop... i left it over nite in a empty tank fill with tap water or put it in salt water then wash it away quickly...it kill away those slug things...

that means this fellow probably in the tank for some time already, gone from small to this size??

19-04-2008, 07:03 PM

[QUOTE=wei;5748932]that means this fellow probably in the tank for some time already, gone from small to this size??[/QUOTE

not really.. hope that this is the last one...that time i kana 11 pcs of that ugly pest. i think i bought the plants with their eggs on it. wa ... really angry and sad lor... i rescaped the whole tank to make sure they are all totally gone. they feed on shrimps and small fishes..now i am very careful of buying plants with d.w..

19-04-2008, 01:46 AM	#1
wei Dragon Join Date: Mar 2002 Posts: 954	ID this insect there have been deaths occurring every other day in my shrimp tank and last night spotted this insect hiding in my 1.5ft shrimp tank. No choice got to decom the whole tank to seek it out... Any one came across this insect before, and will it harm shrimps?? It looks like a cockcoach...maybe aquatic version of it? Attached Thumbnails

19-04-2008, 12:22 PM	#7
wei Dragon Join Date: Mar 2002 Posts: 954	looks more like dragonfly nymph but from top view down, the body is rounder as compared to the pic(posted by luigi), also the hind legs are longer....from side view (the first pic i attached), the head part and front legs looks a bit like praying mantis... realised also that its probably good not to make the tank too dense with vegetation, especially small shrimp tank... Last edited by wei; 19-04-2008 at 12:31 PM.

19-04-2008, 02:41 AM	#2
Nikochan Guest Posts: n/a	bro. picture not so clear. i assume that it is a water beetle and its neutral to ur shrimps. any experts who can identify?

19-04-2008, 03:10 AM	#3
nasty12 Arofanatic Join Date: Mar 2008 Posts: 325	water boat man? the 1 which eat tadpoles?

19-04-2008, 03:32 AM	#4
luigi545 Arofanatic Join Date: Aug 2006 Posts: 437	Don't think it's a water boatman, more like a dragonfly nymph to me after doing a search and compared. Water boatman Link here Dragonfly nymph Link here

19-04-2008, 11:24 AM	#5
nasty12 Arofanatic Join Date: Mar 2008 Posts: 325	hmm but u see the head section.. abit different..

19-04-2008, 12:21 PM	#6
900801 Dragon Join Date: Jun 2005 Posts: 2,520	water beetle?

19-04-2008, 07:03 PM	#10
Ang Kong Siao Guest Posts: n/a	[QUOTE=wei;5748932]that means this fellow probably in the tank for some time already, gone from small to this size??[/QUOTE not really.. hope that this is the last one...that time i kana 11 pcs of that ugly pest. i think i bought the plants with their eggs on it. wa ... really angry and sad lor... i rescaped the whole tank to make sure they are all totally gone. they feed on shrimps and small fishes..now i am very careful of buying plants with d.w..

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