Live Rotifers by Dr.G's Live Rotifers, Live Rotifer Culture, Dr.G's Marine Aquaculture, Live Copepods, Rotifers, Live Phytoplankton
Rotifers from the bird bath Rotifers and protists from the birdbath in the yard ..These have a little horn form on their heads..The identifying characteristic of them is the corona, the two ciliated disks arounding their mouths. They have an almost complete set of organs, a pair of jaws (the trophi), a brain, a dorsal antenna, a stomach and toes on the tail. This species, and many others, even has a pair of eyes that are visible as orange specks above its brain on the back of its head. why such a tiny animal would need binocular vision and what it can actually see are, of course, open to observation ... speculate!
Rotifer Feeding. Rotifer Feeding. A cell is caught in the vortex created by the movement of the animals cilia.
Live feed"Rotifer" used for larvae of Ikan ketutu or Marble Goby Marble goby breeding and farming-.my
Bdelloid Rotifer Video with Canon T1i On Amscope Microscope Part 1 Video of Bdelloid Rotifers. I collected these from some moss that I soaked in water in a Petri dish. Moss and soil seem to be very rich in microscopic life.
Rotifer Cloning Rotifers are tiny zooplankton (~250 microns, four times the diameter of human hair) that eat algae and in turn feed fish larvae, so they are vital to our ecology. Look at the Rotifer inside the "O". It has an egg sac attached to it's body and will rotate counterclockwise then clockwise, finally tearing the egg sac off it's body! These fascinating animals reproduce by cloning (parthenogenesis), giving birth only to females unless they are stressed, then they also give birth to males that can't eat, they are just there to fertilize eggs that can survive drying for up to 100 years.
Bdelloid rotifers in activated sludge A clip by Zika Reh from Subotica Wastewater Treatment Plant activated sludge - www.reh.in.rs
Rotifers (Phylodina) A newly maturing closed system for ornamental fish produced a HUGE bloom of these rotifers. Later on as the system fully matured, their populations decreased, leveled off and is maintained.
rotifer ingesting filamentous bacteria in activated sludge.m1v Video clip shows a rotifer Lecane inermis ingesting filamentous bacteria in the activated sludge sample. Potential of rotifers to control bulking in wastewater treatment plants was described in details in paper entitled: The role of Lecane rotifers in activated sludge bulking control. Edyta Fiałkowska and Agnieszka Pajdak-Stós, Water Research, 42(10-11):2483-2490, 2008
Rotifera: A visual celebration of the smallest animals Rotifera are tiny multicellular animals that are an amazingly important part of the food chain in most aquatic environments. They are the stepping stone in that food chain between bacteria and tiny algae particles and larger creatures, like insect larvae or filter feeders like ducks. Even being so small, they have eyes, a complete digestive system, and even a brain consisting of fif*** cells. Without these amazingly tiny wonders, the ecology webs of the world would collapse.
About Rotifers visit - Want to learn about rotifers? Watch our about LIVE Rotifers video. Visit us at
Protista - Stentor in Rotifer Colony this was originally a culture dish of stentors, but rotifers took it over.. see the result shot by: Esther Jang random comments by: Diana Lee and maybe Terry SeeToe? produced by Hunter College High School students
Mk-19 with Mk-Ranger aiming system Infrared aiming system (Mk-Ranger) used on the Mk-19 full-auto grenade launcher. This allows vary good accuracy for what was previously a very inaccurate weapon. The Mk-Ranger system is built by BE Meyers, and uses two IZLID type IR lasers (one for pointing and one for flood).
ZM Copepods Rotifers River Shrimp mixed culture Mixed culture of rotifers, copepods, and young river shrimp at approx 9mm. This was an accidental mix but instead of being reared on BBS the shrimp have grown really well on the young copepods.
The Happy Rotifer A rotifer happily devours its neighbors.
Our Freshwater Microverse : Rotifers  A free-swiming Rotifer from the phylum Rotifera. Rotifers are small, multi-celled animals that obtain food using a set of cilia (or "hairs"). The cilia rapidly beat in an orginized manner forming a powerful circulation of water and food (bacteria, protists) towards their mouth. In this video, it almost appears as if these discs are rotating, and when first observed under the microscope these animals were called "wheel animalcules". Sample collected from wetland area in SW Michigan. Scale: 20 microns.
Bdelloid Rotifers Recorded with Canon T1i Bdelloid Rotifers recorded at approximately 100x on an Amscope Model T-490B Trinocular scope with a Canon T1i mounted on the trinocular port and tethered to a PC using EOS Utility to record. You can clearly see the rotary organs on the head here, [they don't really roatate, it's an optical illusion]. The Mastax is also clearly visdible, which is an organ equivilant to chompers, or your own teeth. These organs have been found in 100 million year old amber, the only prehistoric microbe parts ever found, other than testate amoeba shells and pollen. Canon provides free software to shoot tethered to PC or Mac computers, using a supplied USB cord. It actually works quite well for stills and video. When using the camera with an AF lens, you can even focus using the buttons on the EOS Utility panel. When mounted on a microscope, focus is done with the microscope knobs. The T1i is the 5th camera I have used, in search of something that would take good quality video and so far, it has done the best job. I have also used a Canon 1DMkIII for still, which did OK, but has the problem of blur from the shutter caused shake. I have used two Tucsen USB tube cameras, a 10Mp and a 5Mp. I would never recommend these cameras to anyone. They are pure junk and so is the software that comes with them. The last camera I tried was a CCD Sony surveillance type camera that actually did quite well, but you need to have a TV IN card on your computer to connect and record to. While I freely admit to ...
Rotifers! Rotifers taken from the water of my Algae open photobioreactor.
Our Freshwater Microverse: Rotifers  This Rotifer (Monostyla lunaris) is seen foraging along the cells of some green algae. Notice how the Rotifer's "tail" has damaged the algae cell it is attached to. Collected in freshwater sample from a wetland in Southeast Michigan. Real time video rate. Scale: 20 microns. HD format.
Bdelloid Rotifer Video with Canon T1i On Amscope Microscope Part 2 Video of Bdelloid Rotifers. I collected these from some moss that I soaked in water in a Petri dish. Moss and soil seem to be very rich in microscopic life.
Three Species Of Rotifer I have not been able to identify any of these yet. This is the first time I have seen any rotifers with the two long toes, other than in images or videos. The sample came from my 3 gallon glass candy jar that I use for an aquarium. I started it a couple weeks ago, as an attempt to keep some samples alive through the winter. So far it is working well, producing an unending supply of microscopic subjects. The best of which are found chomping on some Tetramin flake food I put in the tank periodically as treats for the snails. These rotifers were attached to some older flakes that were near the surface. Watch closely at about 4:20 in the video, as the rotifer snatches a microbe swimming by and gobbles him down. By the way, I am looking for a Nikon Fluophot Phase Contrast Condenser. If you have one for sale, or know of one, please contact me.
Brachionus Calyciflorus male rotifers harassing a female we shot this video in our lab using a camera fixed on our inverted microscope. It illustrates the behavior of male rotifers around a female rotifer. The males are the smaller organisms moving faster. The female is the larger organism moving slower
(red) Rotifer feeding I got some water from a bird bath and looked at it under my microscope. There were tons of these rotifers in it, but what I'd like to know is why are mine red when the other ones I saw on youtube were clear. This is a video of a rotifer feeding, the two protruding parts at the front are how it feeds, the cillia scrape in bacteria and other food like a vacuum cleaner. This was taken at 100x magnification.
Rotifer Rotifer in action
The Rotifer's lunch Dispite their small dimensions, Rotifers are multicelled animals. Rotifers, whose name in latin means "wheel-bearer", have a crown of cilia around the mouth that they use to make a water circulation. The Video shows a rotifer (Philodina sp. ?) while feeding. Thanks to the microscope technique called dark field, it's possible to see the particles of organic matter moving toward the mouth of the organism. Food is then passed into the "mastax", a structure to grind the food. Rotifers are omnivorous; their diet most commonly consists of dead or decomposing organic materials, as well as unicellular algae.
Rotifer eating green algae Scenedesmus dimorphus Rotifers eating a microalgae
Rotifers Several Philodina rotifers swimming about & feeding
rotifers & copepods Culturing rotifers & copepods
Rotifers A pair of rotifers and some haematococcus from my rain gauge. www.vk2
Marble Goby breeding and farming-live feed for marble goby larvae(production of rotifers) Rotifer is the live feed for 2nd day until 12th day-old larvae of marble goby .High mortality would encounter if no rotifer is fed to the marble goby larvae from 2nd day onward .
Rotifer Rotifera Fossil range: Eocene - Recent Rotaria Rotaria Scientific classification Domain: Eukarya Kingdom: Animalia Subkingdom: Eumetazoa Superphylum: Platyzoa Phylum: Rotifera Cuvier, 1798 Classes Monogononta Digononta Seisonidea The rotifers, or rotifaers, make up a phylum of microscopic and near-microscopic pseudocoelomate animals. They were first described by Rev. John Harris in 1696 and other forms were described by Anton van Leeuwenhoek in 1703. Most rotifers are around 0.1-0.5 mm long (although their size can range from 50μm to over 2 millimeters) , and are common in freshwater environments throughout the world with a few sal***er species. Some rotifers are free swimming and truly planktonic, others move by inchworming along the substrate, and some are sessile, living inside tubes or gelatinous holdfasts that are attached to a substrate. About 25 species are colonial (eg, Sinantherina semibullata), either sessile or planktonic. Rotifers play an important part of the freshwater zooplankton, being a major foodsource and with many species also contributing to decompositioning of soil. See images of the Rotifer on our Flickr pages
Rotifer Eggs and their Movement Several interesting things in one video. At the bottom right are a bunch of rotifer eggs. The one near the centre of the screen looks like it's almost ready to hatch. Looking at the two rotifers at the upper left, you can see how they 'irritate' each other and how one uses its 'feet' to move around.
More Rotifers Living The Good Life I love watching these guys with their spinning heads. They are a beneficial microbe that helps clean the environment of bad cells. When they move, they remind me of an inchworm, and who doesn't like inchworms? If you are looking for Rotifers to view with your microscope, find some moss on an old dead tree or stump and put some in a covered dish with enough water to almost cover it. Let it site for a few days, and if you keep it wet, you can keep using it as a self generating sample. Use an eyedropper of pipette to get a couple drops of water, right from the moss. Push it down into the moss and suck up water through the moss to get all the good stuff. You should find lot's of Rotifers and Nematodes and who knows, a tardigrade or two. Microscope: Nikon Fluophot Flourescence Research Microscope Camera: Canon T1i w/ EOS to 23mm adaptor w/Nikon 10x Projector lens Scope Settings: 15.1 MP Canon 1.6x Camera over 10x Objective
rotifers under microscope at 40x As far as I know, these are the Brachionus plicatilis ("L" type) of rotifers.
Philodina Rotifers and Vorticella Photos and video of both rotifers and vorticella
Rotifers in the Mist I spent one afternoon chasing microscopic organisms through depths of fields like some Stanley Kubrick of the really small world. Rotifers remind me of the Sandworms of Dune: a set of huge jaws the size of their own body. Thing of nightmares.
Rotifers from the bird bath with closeup SEM Rotifers close up from the bird bath
Death of a Rotifer When I don't play banjo, I try to make time for a little microscopy. Actually, this little Philodina could live for another decade in this dessicated state. Don't be scared, these little guys are really little animals with specialized cells....about 1000 of them. Rotifers can be found in lakes, mud puddles, moist soil, mushrooms and tree trunks. Just another unsung link in the food chain. This was captured at 600X magnification and shot with a Nikon S2 on macro function. ,,,,,,enjoy!
Rotifers vs. Fungus The parasitic fungus Rotiferopthera angustispora attacks Bdelloid rotifers.
Rotifers under microscope L-strain Rotifers under 4x and 10x Magnification.