Life in pond water is fascinating. It’s filled with an amazing variety of plants, animals and other organisms. While you can see some of these creatures with the naked eye, most of them are too small and require a microscope to be seen and observed properly. From protozoa to micro-animals like water bears, pond water consists of amazing microscopic organisms. Theycan be found in just a drop of pond water; imagine how tiny they must be!

At Blades Biological Ltd, we offer biological education specimens and equipment for various laboratories in the UK. This also includes a range of microscopic pond organisms found within an aquatic ecosystem. If you want to learn more about the amazing world within ponds, this guide and our products can help you discover these tiny creatures and their many characteristics.

Bacteria

Bacteria are one of the most commonly found biological equipment for sale. They are single-celled organisms that thrive in lakes, ponds, swamps, and other diverse environments. Bacteria are small and simple cells with diverse shapes like rods, spheres, filaments, etc. Since they don’t have any membrane-bound nuclei and other organelles, bacteria are prokaryotes.

Cyanobacteria

Cyanobacteria are commonly known as blue-green algae. According to scientists, cyanobacteria played a crucial role in Earth’s history by producing the highest amount of O₂ in the atmosphere.

Cyanobacteria are a phylum of photosynthetic bacteria which are commonly found in lakes and streams where they can exist in multicellular colonies, hence are often mistaken for algae. Despite playing key roles in the environment, excess nutrients can cause bacterial blooms. These blooms then release cyanotoxins which can be dangerous to animals and humans.

 

Protophyta

Protophyta is a term used for a group of “plant-like” protists. Like cyanobacteria, they also obtain their energy through photosynthesis and are autotrophic. Here we list some of these protists:

Green Algae

Green algae are easy to collect from pools, lakes, or ponds, and you can clearly observe their cell structure under a microscope.

Diatom

It’s a group of microalgae—free-floating unicellular algae—found in oceans and freshwater. What makes them unique from other algae is their cell wall whichis made of glass-like silica called a frustule. This wall interacts with the visible light spectrum, creating a colourful and shiny appearance. Therefore, diatoms are called jewels of the sea.

Synura

It’s a group of golden-brown algae found in freshwater ponds mostly. They assemble into a cluster and have yellow-coloured silicate scales.

Protozoa

Protozoa are unicellular protists that exhibit animal-like characteristics. Unlike protophytes that obtain energy from photosynthesis, protozoa eat other microorganisms like bacteria to produce energy.

Amoeba

Amoeba proteusis most commonly used in classroom experiments and research laboratories due to its unique properties. They are known for their crawling movements and the ability to constantly change their shape.

Shelled Amoeba

As the name suggests, shelled amoebae have a protective shell around them known as tests. Amoebae make these tests by themselves. They collect sediment particles around them and use the slime-like ingredients secreted from their cells to glue the particles together.

Heliozoa

Also known as sunanimalcules, Heliozoaare related to Amoebas. They feature a spherical body and stiff arms that help them capture food, move, and attach to other organisms.

Ciliate

Most pond water microorganisms are ciliates. They are characterised by their hair-like organelles and caked cilia.

Paramecia

Paramecia is a unicellular ciliate that has the ability to do almost everything a multicellular creature does. It can swim, reproduce, digest food, etc. It has microscopic hair-like oars around its body, allowing it to propel through the water faster than any other organism. Scientists suggest that if paramecium was as tall as a person, it could swim four times faster than an Olympic gold medallist swimmer.

Euglena

Did you know a Japanese company actually sells Euglena energy bars and cakes?

Euglena is one of the most interesting microscopic pond organisms whose discovery confused biologists because it has characteristics of both plants and animals. It can make its own food through chloroplasts (a plant characteristic) and consumes food through phagocytosis (an animal characteristic). Moreover, they have high nutrient value and might become a future food source.

 Other Protozoa

• Didinium
• Lacrymaria
• Coleps
• Stentor
• Suctoria
• Vorticella

Micro-Animals

Unlike most single-celled microorganisms, micro-animals are microscopic multicellular organisms. These organisms can be even smaller than some protozoa and can only be observed under a microscope. Here’s a list of micro-animals found in pond water.

Rotifers

Rotifers have two rows of cilia which undulate and look as though the front of the rotifer is rotating, giving the organism it’s name. They are microscopic aquatic animals with jawed mouths and sensory, reproductive, and digestive organ systems. They feed on dead material, bacteria, algae, and other living organisms. Did you know that rotifers have a digestive system surprisingly similar to us humans?

Daphnia

Daphnia, also known as Water Fleas, is a planktonic micro-animal because they live by drifting in a body of water. Some species are very tiny, as small as 0.2mm, while others can be larger and are easily visible to the human eye. They are found in slow-moving water as they are unable to swim against strong currents. They use their legs and antennae to stay suspended in water.

You can buy live daphnia online here.

Planaria

They belong to the family of flatworms found in freshwater ecosystems. Although most flatworms are parasitic, planaria are carnivorous, eating both living and dead aquatic organisms such as pond snails. If you cut them into pieces, each piece will generate an individual planarian.

Tardigrades

Tardigrades, one of the most fascinating microscopic pond organisms, are mostly known as moss piglets or water bears. They possess characteristics of a bear, such as chubby bodiesand short legs.

Other Micro-Animals

• Hydra
• Neonates
• Oligochaeta
• Gastrotrich
• Arthropods
• Copepod
• Amphipod
• Ostracod
• Mosquito larva

If you want any of these microscopic pond organisms, you can get them from the pond life collection at Blades Biological Ltd. We have many science experimentsspecimens such as daphnia pulex, amoeba proteus, and algae for sale. You can also buy Carolina Biological Supply’sLife in a Pond Set from our website. It consists of blue-green algae, green algae, protozoa, animals, and plant microorganisms. Contact us for more details.