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Flag Pen Shell (Atrina vexillum)

Photo of Flag Pen Shell (Atrina vexillum)

Key facts

Scientific name
Atrina vexillum
Common name
Flag Pen Shell
Category
Molluscs
Family
Pinnidae
Genus
Atrina
Size
20–40 cm
Depth
10–60 m
IUCN status
Least concern (LC)
Danger level
Harmless
Habitats
sandy-bottom, seagrass-meadow
Behaviours
benthic, solitary, slow-mover
Ocean zones
Asian Pacific, Caribbean, Eastern Pacific, Indian Ocean & Red Sea

Description

Atrina vexillum reaches 40 cm. Bivalve (Mollusca) Indo-Pacific. Black triangular shell. Anchored by byssal threads. Plankton filter-feeder. Reefs-sands-seagrass 10-60 m. LC. Poorly visible.

Photo of Flag Pen Shell

Photo of Flag Pen Shell (Atrina vexillum)

Frequently asked questions

How big is the Flag Pen Shell?
Flag Pen Shell (Atrina vexillum) reaches 20–40 cm in length.
At what depth can you find the Flag Pen Shell?
Flag Pen Shell is found between 10–60 m deep.
Is the Flag Pen Shell dangerous to divers?
Danger level: Harmless.
What is the conservation status of the Flag Pen Shell?
IUCN status: Least concern (LC).
Where can you find the Flag Pen Shell?
Found in: Asian Pacific, Caribbean, Eastern Pacific, Indian Ocean & Red Sea.

Other species in the genus Atrina

  • Atrina rigida - Rigid Pen Shell

Other species in the family Pinnidae

  • Pinna nobilis - Noble pen shell

Sources

  • Taxonomy: WoRMS (AphiaID 216652)
  • Photos: iNaturalist (CC BY-NC)
  • Distribution: GBIF (taxonKey 4374728)
  • Conservation: IUCN Red List
  • Encyclopedia: Wikipedia