Bay Nettle
ExploreAnimal
Bay Nettle
chrysaora chesapeakei
The Bay Nettle (Chrysaora chesapeakei) is an abundant and ecologically vital species of sea nettle native to the brackish waters of the East Coast of the United States. Famously associated with the Chesapeake Bay, this species was scientifically distinguished from its open-ocean cousin, the Atlantic Sea Nettle, in 2017. As key predators in estuarine ecosystems, they play a crucial role in controlling populations of comb jellies and other zooplankton, which helps protect oyster and fish larvae. Though their venomous sting can be painful to swimmers, these translucent drifters are a fascinating example of estuarine adaptation, thriving in lower-salinity environments where other jellyfish cannot survive.
Habitat: Typically found in brackish estuaries, shallow coastal bays, and river mouths along the Atlantic coast of North America.
Appearance
The Bay Nettle features a translucent, saucer-shaped bell that typically ranges from 10 to 20 centimeters in diameter, often marked with distinctive reddish-brown stripes radiating outward from the center like wheel spokes. Extending from the edge of the bell are up to 40 thin, stinging tentacles, accompanied by four long, ribbon-like oral arms that gracefully dangle from the center of the underside. Its coloration ranges from milky white to a delicate pinkish-yellow, making it highly visible as it pulses near the water's surface.
KingdomAnimaliaPhylumCnidariaClassScyphozoaOrderSemaeostomeaeFamilyPelagiidaeGenusChrysaora
Category
AnimalRarity
Common
Danger
1/5 · Very low
Snaps
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Interesting facts
By feeding on comb jellies that eat oyster larvae, Bay Nettles indirectly help protect and boost the populations of local oysters.
Their bodies are composed of roughly 95% water and they survive without a brain, heart, or bones, relying entirely on a basic nerve net.
Until a DNA sequencing study in 2017, the Bay Nettle was considered the exact same species as the larger, open-ocean Atlantic Sea Nettle.
Special abilities
Ability
Nematocyst Battery
Deploys specialized stinging cells along its tentacles that mechanically trigger on contact to inject paralyzing venom into prey.
Ability
Salinity Tolerance
Possesses a highly specialized osmoregulatory system allowing it to thrive in low-salinity estuarine environments.
Ability
Tissue Regeneration
Capable of rapidly healing and growing back damaged bell tissue and severed tentacles lost to predators or rough wave action.
Measurements & details
- Length
- 5-25 cm
- Weight
- 0.05-0.4 kg
- Lifespan
- up to 1 years
- Top Speed
- 1 km/h
- Clutch Size
- 5000-50000
Diet & Feeding
Mainly feeds on soft-bodied zooplankton, larval fish, and other gelatinous creatures drifted into its path.
Age differences: As microscopic polyps, they consume tiny ciliates and rotifers, whereas the adult medusa stage captures much larger prey like comb jellies and small fish.
Primary Foods
- Comb jellies
- Copepods
- Fish larvae
- Bay anchovy eggs
Foraging Method
- Ambush
Ecological connections
hunts
Sea Walnut
Mnemiopsis leidyi
Preys heavily upon this abundant comb jelly, preventing it from consuming too many oysters and fish larvae.
eaten by
Leatherback Sea Turtle
Dermochelys coriacea
This large marine reptile is immune to jellyfish stings and actively preys on adult Bay Nettles.
mutualism
Harvestfish
Peprilus paru
Juveniles of this fish species live commensally among the stinging tentacles of the sea nettle for protection from larger predators.
Traits
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Also known as
No aliases listed yet.
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Safety
Danger
1/5 · Very low
No special safety notes yet.
Frequently Asked Questions
How to identify Bay Nettle?
The easiest way to identify Bay Nettle is to use the Snappit nature identifier app.
How long is Bay Nettle?
5-25 cm
How much does Bay Nettle weigh?
0.05-0.4 kg
How long does Bay Nettle live?
up to 1 years
How fast can Bay Nettle move?
1 km/h
What does Bay Nettle eat?
Mainly feeds on soft-bodied zooplankton, larval fish, and other gelatinous creatures drifted into its path.
Where is Bay Nettle usually found?
Typically found in brackish estuaries, shallow coastal bays, and river mouths along the Atlantic coast of North America.
How does Bay Nettle hunt?
Ambush
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