Ostracod

ostracod environmental sample

Ostracods are tiny creatures that live in water. They have hard shells like armor and come in many colors. Some ostracods even glow in the dark!

Habitat: Aquatic

Appearance

The Ostracod is a tiny, often translucent or greenish-brown crustacean, encased within a two-part shell that resembles a miniature clam or seed. Its smooth or bristly carapace completely covers its body, making it look like a moving speck.

KingdomAnimaliaPhylumArthropodaClassOstracodaOrderPodocopidaFamilyCyprididae

Ostracod

Interesting facts

Certain female ostracods can reproduce all by themselves, creating only female babies!

Even though tiny, they live in almost every water body, from oceans to puddles!

Fossil ostracods are older than dinosaurs, existing for over 500 million years!

Some ostracods can dry out for years, only to revive when water returns!

Special abilities

Ostracod can emit bright blue light from its body that helps them distract predators or attract mates.

Ostracod has a hard, clam-like shell that helps them protect their soft body from being eaten by larger animals.

Ostracod can produce eggs that remain dormant for years, helping them survive droughts and harsh environments.

Measurements & details

Size: 0.2-2 mm
Lifespan: 20-120 days
Leg Count: 6

Diet & Feeding

Ostracods eat tiny plants, decaying bits, or even smaller animals, using their feathery legs.

Primary Foods

algae
detritus
bacteria
diatoms
protozoa
small invertebrates

Foraging Method

Foraging

Ecological connections

eaten by

Yellow Perch

Perca flavescens

key food for juvenile perch.

eaten by

Mosquitofish

Gambusia affinis

a common food for small fish.

eaten by

Freshwater Hydra

Hydra vulgaris

tiny polyps ambush and consume them.

Traits

Omnivorous

Meet versatile eaters who enjoy a wide variety of foods, from plants to other animals, allowing them to adapt to many different environments. They're nature's flexible diners!

Filter Feeder

Discover amazing animals that filter their food right from the water! They have special ways to strain tiny bits of plants or other creatures to eat.

Ancient Lineage

These fascinating organisms carry echoes of the deep past, with ancestors that have roamed the Earth for an incredible span of time. They are living links to ancient worlds!

Keystone Species

Discover the hidden heroes of nature! These special species play an incredibly important role in their habitat, holding the entire ecosystem together like a crucial piece of a puzzle.