Water flea in dark-field illumination

Post your images made through a compound microscope or made with a stereo/dissecting microscope in this gallery. Images may be of any subject natural or unnatural, living or non-living.

Moderators: MacroMike, nzmacro, Ken Ramos, twebster, S. Alden

Charles Krebs
Posts: 1200
Joined: Tue Jul 13, 2004 10:50 am
Location: Issaquah, WA USA

Water flea in dark-field illumination

Post by Charles Krebs »


While I have seen pictures of this species before, last night was the first time I have actually seen one "up close and personal". I noticed a small patch of odd looking "debris" floating on the top of a recent sample jar. Under the microscope it turned out to be a fairly large number of these water fleas, many just "born", and the adults obviously having just given "birth". This one still has a reticent "infant" still on board, but it appears that it recently had a rather large brood occupying most of the carapace (not much room left for the internal organs!).

10X objective, 2.5X photo-eyepiece. Canon 10D.

User avatar
Posts: 852
Joined: Mon May 24, 2004 6:51 pm
Location: New Zealand

Post by Kenv »

Beautiful darkfield shot Charlie. I don't seem to see many of these little fellas, I must look a bit further afield.

User avatar
Posts: 445
Joined: Wed Apr 28, 2004 8:44 am
Location: San Diego

Post by piotr »

Amazing resolution and perfect exposure. Very nice picture.

Wim van Egmond
Posts: 440
Joined: Fri Apr 08, 2005 5:17 am
Location: Rotterdam, the Netherlands

Post by Wim van Egmond »

That is a nice image of Bosmina probably: longirostris, Charlie. They are quite common here in the waters near me. They often float on the surface after collecting, seems like they are having difficulty with the surface tention.

I am a bit silent because I'm trying to get the flash on my microscope working. It was not easy because first the flashtube burned (turned out to be the wrong type of tube for the rest of the flash unit) and because of that the whole flash unite was damaged beyond (cheap) repair. But now I borrowed a flash from a friend. Give me a couple of days and I'll post something new.


User avatar
Posts: 360
Joined: Sat May 07, 2005 8:54 am
Location: North East of England

Post by GreenLarry »

Neat image, i didnt notice the 'baby' at first!
Looks like a Bosmina.