Northern Bay Mussel
ExploreInvertebrate
Northern Bay Mussel
Mytilus trossulus
The Northern Bay Mussel is a small, tasty shellfish that lives in the ocean. They have strong shells and can be found clinging to rocks in coastal areas.
Habitat: Coastal areas
Appearance
The Northern Bay Mussel is a peculiar insect with a hard, two-part exoskeleton that strikingly resembles a dark blue or black mollusc shell. Its flattened, oval body, often adorned with faint growth rings, allows it to blend seamlessly into rocky coastal environments, making it hard to distinguish from actual mussels.
KingdomAnimaliaPhylumMolluscaClassBivalviaOrderMytilidaFamilyMytilidaeGenusMytilus
Category
InvertebrateRarity
Common
Danger
1/5 · Very low
Snaps
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Interesting facts
It creates strong, silky threads to anchor itself firmly to underwater surfaces.
Some Northern Bay Mussels change sex, starting male then becoming female!
Their shell-like appearance helps them perfectly mimic real mussels on the seafloor.
This insect's tough, two-part casing offers amazing protection from hungry predators!
Special abilities
Ability
Super Sticky Anchors
Northern Bay Mussel can cling securely to rocks because of specialized adhesive pads on its legs that help resist strong ocean currents.
Ability
Microscopic Meal Filter
Northern Bay Mussel has fine, comb-like bristles that help them filter tiny plankton and algae from the water.
Ability
Underwater Breath
Northern Bay Mussel can breathe efficiently underwater because of feather-like gills tucked beneath its shell-like exoskeleton.
Measurements & details
- Size
- 15-40 mm
- Lifespan
- 365-730 days
- Leg Count
- 6
Diet & Feeding
This amazing insect filters tiny food particles from the water, helping to keep the aquatic environment clean.
Primary Foods
- Phytoplankton
- Zooplankton
- Diatoms
- Detritus
- Algae
Foraging Method
- Filter Feeding
Ecological connections
eats
Ochre Sea Star
Pisaster ochraceus
A key predator of mussel beds in rocky intertidal zones.
hunts
Frilled Dogwinkle Snail
Nucella lamellosa
Hunts and consumes mussels, drilling through their shells for food.
eats
Red Rock Crab
Cancer productus
Crushes the shells of mussels and other intertidal invertebrates.
eats
Glaucous-winged Gull
Larus glaucescens
Drops mussels from height to break their shells for consumption.
Traits
Social
Social animals live in organized groups, cooperating for survival benefits such as foraging, defense, and raising offspring.
Filter Feeder
Filter feeders obtain nutrients by straining suspended food particles and small organisms from water.
Herbivorous
This trait characterizes organisms whose diet consists entirely or primarily of plant material.
Longevous
This trait characterizes organisms with an exceptionally long lifespan compared to others of their kind.
Coastal
Coastal habitats are dynamic environments located along the interface between land and sea, influenced by tides, waves, and saltwater.
Armored
Armored describes animals protected by a hard, external covering or shell for defense.
Keystone Species
Describes a species whose presence and role have a disproportionately large effect on its environment.
Marine
Marine habitats encompass all saltwater environments of the Earth's oceans, supporting an immense diversity of aquatic life.
Also known as
No aliases listed yet.
Collections
Safety
Danger
1/5 · Very low
Don't touch or eat mussels you find on the beach without asking an adult first.
Frequently Asked Questions
How big is Northern Bay Mussel?
15-40 mm
How long does Northern Bay Mussel live?
365-730 days
What does Northern Bay Mussel eat?
This amazing insect filters tiny food particles from the water, helping to keep the aquatic environment clean.
Where is Northern Bay Mussel usually found?
Coastal areas
How does Northern Bay Mussel hunt?
Filter Feeding
How many legs does Northern Bay Mussel have?
6
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