Green Falsejingle
ExploreInvertebrate
Green Falsejingle
pododesmus macrochisma
The Green Falsejingle (Pododesmus macrochisma) is an intriguing marine bivalve mollusk belonging to the family Anomiidae, commonly known as jingle shells. Found anchored to hard surfaces along the cold coastal waters of the North Pacific, this resilient species is famous for its highly irregular, translucent, and pearly shells. What makes the Green Falsejingle particularly fascinating is its physical adaptation to its rocky environment: it permanently cements itself to substrates using a calcified byssus plug that protrudes through a specialized hole in its lower shell valve. Over time, its upper shell grows to match the exact contours of the rock it rests upon, making it a master of structural conformity.
Habitat: Inhabits low intertidal to subtidal rocky shores, permanently cemented to hard substrates like reefs, stones, and dock pilings.
Appearance
This bivalve features an irregular, circular-to-oval shell reaching up to 10 cm in diameter, with a highly distorted, rough outer surface that mimics surrounding rocks. The upper valve is typically a dull gray, brown, or pale green on the exterior, often covered in algae or bryozoans. However, the interior of the shell is spectacular, showcasing a brilliant, iridescent pearly-green to blue-green luster. The flat lower valve, which is typically smaller and thinner, contains a highly distinctive, large pearly-bordered hole near the hinge where the securing plug emerges.
KingdomAnimaliaPhylumMolluscaClassBivalviaOrderPectinidaFamilyAnomiidaeGenusPododesmus
Category
InvertebrateRarity
Common
Danger
1/5 · Very low
Snaps
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Interesting facts
Its stunning, pearly green interior color comes from a combination of organic pigments and the physical structure of the nacre, which reflects light.
Known as 'jingle shells' because a handful of empty shells clink together with a metallic, bell-like sound.
Native peoples once used the shiny, translucent shells of related jingle shell species as natural wind chimes and decorative ornaments.
The lower shell has an actual hole through which a calcified byssus plug emerges, gluing the animal permanently to a rock so tightly that the shell conforms to the rock's shape.
Special abilities
Ability
Calcified Byssal Anchor
Secures itself to rocks by producing a liquid secretion that hardens into a solid, bone-like calcified plug through a hole in its lower shell.
Ability
Conformational Growth
Sparsely molds the growth of its upper shell to match the exact surface texture and curves of the substrate below it for reduced drag.
Ability
Nacreous Strengthening
Deposits thick layers of iridescent nacre on its inner shell surface to reinforce structural integrity against crashing waves.
Measurements & details
- Length
- 5-10 cm
- Weight
- 0.05-0.2 kg
- Lifespan
- 3-10 years
- Clutch Size
- 10000-100000
Diet & Feeding
A suspension feeder that filters seawater to extract phytoplankton, diatoms, and organic detritus.
Age differences: Larvae are free-swimming planktotrophic veligers feeding on microalgae, while adults are sessile filter feeders.
Primary Foods
- Phytoplankton
- Diatoms
- Organic detritus
- Microalgae
Foraging Method
- Filtering
Ecological connections
eaten by
Ochre Sea Star
Pisaster ochraceus
Preyed upon by sea stars which can pry apart or dissolve the shell.
eaten by
Giant Pacific Octopus
Enteroctopus dofleini
Octopuses use their radula and beak to drill into and consume the bivalve.
competitor
Bull Kelp
Nereocystis luetkeana
Both species attach to rocky reefs, occasionally competing for attachment space in high-energy zones.
Traits
No trait badges are assigned for this object yet.
Also known as
No aliases listed yet.
Collections
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Safety
Danger
1/5 · Very low
No special safety notes yet.
Frequently Asked Questions
How to identify Green Falsejingle?
The easiest way to identify Green Falsejingle is to use the Snappit nature identifier app.
How long is Green Falsejingle?
5-10 cm
How much does Green Falsejingle weigh?
0.05-0.2 kg
How long does Green Falsejingle live?
3-10 years
What does Green Falsejingle eat?
A suspension feeder that filters seawater to extract phytoplankton, diatoms, and organic detritus.
Where is Green Falsejingle usually found?
Inhabits low intertidal to subtidal rocky shores, permanently cemented to hard substrates like reefs, stones, and dock pilings.
How does Green Falsejingle hunt?
Filtering
How many eggs does Green Falsejingle lay?
10000-100000
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