Mnemiopsis leidyi

Mnemiopsis leidyi

The Mnemiopsis leidyi, also known as the sea walnut, is a jelly-like creature that lives in the ocean. It has a beautiful, glowing body and can be found swimming in warm coastal waters.

Habitat: Coastal areas

Appearance

The Mnemiopsis leidyi is a transparent, jelly-like animal with an oval body and two distinct oral lobes. It has eight rows of iridescent comb plates that shimmer with rainbow colors. Unlike true jellyfish, it lacks stinging tentacles.

KingdomAnimaliaPhylumCtenophoraClassTentaculataOrderLobataFamilyBolinopsidaeGenusMnemiopsis
Mnemiopsis leidyi
social trait badgefilter_feeder trait badgecoastal trait badgecarnivorous trait badge
Mnemiopsis leidyi

Category

Invertebrate

Rarity

Common

Danger

2/5 · Low

Snaps

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Interesting facts

It doesn't have a brain or bones, just a simple jelly body!

It's called a 'comb jelly' because it uses tiny, hair-like combs to move through water!

Mnemiopsis leidyi is a super speedy eater, consuming huge amounts of tiny ocean creatures!

This amazing animal can be both a male and female at the same time!

Special abilities

Ability

Ocean Rainbow

Mnemiopsis leidyi has rows of tiny beating hairs that refract light, creating a shimmering, rainbow effect as it swims.

Ability

Nighttime Glow

Mnemiopsis leidyi can produce its own light (bioluminescence) that helps them glow in the dark ocean depths.

Ability

Rapid Reproduction

Mnemiopsis leidyi can quickly create many offspring on its own, which helps them spread rapidly in new areas.

Ability

Sticky Food Net

Mnemiopsis leidyi has wide oral lobes that act like a net to funnel tiny plankton into its mouth for food.

Measurements & details

Size
20-100 mm
Lifespan
60-180 days
Leg Count
0

Diet & Feeding

It gulps down tiny plankton and larvae using a wide mouth, helping clear the water.

Primary Foods

  • Zooplankton
  • Copepods
  • Fish larvae
  • Other small invertebrates

Foraging Method

  • Filter Feeding

Ecological connections

eats

copepod

Acartia tonsa

Consumes vast quantities of these small crustaceans from the water.

eaten by

Beroid comb jelly

Beroe ovata

This specialized predatory comb jelly actively hunts and eats it.

eats

European anchovy

Engraulis encrasicolus

Preys on the eggs and larvae of this commercially important fish.

Traits

Also known as

Sea Walnut

Collections

Safety

Danger

2/5 · Low

If you see one on the beach, don't touch it! They can sting.

Frequently Asked Questions

How big is Mnemiopsis leidyi?

20-100 mm

How long does Mnemiopsis leidyi live?

60-180 days

What does Mnemiopsis leidyi eat?

It gulps down tiny plankton and larvae using a wide mouth, helping clear the water.

Where is Mnemiopsis leidyi usually found?

Coastal areas

How does Mnemiopsis leidyi hunt?

Filter Feeding

How many legs does Mnemiopsis leidyi have?

0

Snap Map

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Where to spot

More Invertebrate