The Nomura Jellyfish (Nemopilema nomurai) is a large and impressive species of jellyfish that is primarily found in the waters of the northwest Pacific Ocean. Here are some characteristics of the Nomura Jellyfish:
- Size: Nomura Jellyfish are known for their immense size, and they can reach remarkable dimensions. The bell of a fully grown Nomura Jellyfish can measure up to 2 meters (6.6 feet) in diameter, and its tentacles can extend several meters in length.
- Bell Shape and Coloration: The bell of the Nomura Jellyfish is typically round and can vary in coloration, ranging from pale white or yellowish to a darker shade of brown or maroon. The surface of the bell is often textured with warts or bumps.
- Large Oral Arms: The Nomura Jellyfish has long, thick oral arms that hang down from the center of its bell. These arms help to capture prey and transport it to the jellyfish’s mouth, which is located on the underside of the bell.
- Stinging Cells: Like other jellyfish, the tentacles of the Nomura Jellyfish are armed with stinging cells called nematocysts. These stinging cells are used to immobilize and capture their prey, which primarily consists of small fish and zooplankton.
- Seasonal Blooms: Nomura Jellyfish are known for their periodic population explosions, often referred to as “blooms.” These blooms can occur in response to environmental conditions such as temperature, food availability, and salinity. During these blooms, large numbers of Nomura Jellyfish can congregate in coastal areas, potentially causing disruptions to fisheries and aquaculture operations.
- Habitat: Nomura Jellyfish are typically found in the waters of the northwest Pacific Ocean, particularly in the coastal regions of Japan, China, and Korea. They are known to migrate with ocean currents and can be found in both offshore and nearshore areas.