meduusoja

Meduusa is a Finnish term that translates to "jellyfish" in English. Jellyfish are free-swimming marine animals belonging to the phylum Cnidaria. They are characterized by their gelatinous, bell-shaped bodies and trailing tentacles. These tentacles often contain stinging cells called cnidocytes, which can be used for defense or to capture prey.

The body of a jellyfish is primarily composed of water, making them translucent and delicate. They lack a brain, heart, and bones, relying on simple nerve nets to coordinate their movements and responses. Jellyfish drift with ocean currents, though some possess the ability to pulsate their bells for propulsion. Their diet typically consists of small plankton, fish eggs, and other small invertebrates.

Jellyfish are found in all oceans, from the surface to the deep sea. Their life cycles often involve both a polyp and a medusa stage. While many jellyfish species are harmless to humans, some possess venomous stings that can cause pain, irritation, or more severe medical reactions. They play a significant role in marine ecosystems, serving as both predators and prey for other marine life. The term "meduusa" in Finnish refers to this diverse group of marine invertebrates.