Seaweed Flies (Fucellia)

Latin Name	Observation Date	Location
Genus Fucellia	Oct 08, 2026	Natore, Bangladesh

Scientific Name:
In the scientific world, these flies belong to the genus Fucellia. Generally, they are called 'seaweed flies' or marine algae flies.

Family and Genus:
According to the classification of the animal kingdom, this insect belongs to the family Anthomyiidae of the order Diptera. It is a species of the genus Fucellia.

Origin and Habitat:
They are widely scattered and live in various coastal regions, beaches, around water bodies, and in wet leaf-littered places worldwide. Algae accumulated on sea shores and wet damp environments are their favorite places to live.

Food:
Their larvae or caterpillars mainly grow up by eating decomposing marine algae and organic waste of sea shores. Meanwhile, adult flies collect nutrition from decomposing materials and natural juices.

Reproduction:
Female flies lay eggs on wet algae or decomposing materials of the shore. The larvae hatched from the eggs grow by taking food while staying in that algae, and at a later time, they transform into the pupal stage and emerge as adult flies.

Benefits:
They play an important role as natural cleaners in rapidly decomposing and mixing decaying organic waste and algae accumulated around beaches and the environment into the soil.

Harmful Aspects:
Generally, they do not play a major harmful role for humans or crops. However, if they increase in excessive numbers, they can cause some nuisance around wet or decomposing waste.

I learned about them from various sites including iNaturalist, Wikipedia and Google.

_{​(All posts are written in Bengali and translated into English using Google Translate.)}

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Camera Used	Samsung SM-G973F
F-Stop	F2.4
ISO speed	ISO
Focal length	26mm
Flash	No
Editing app	Lightroom
Photography	(Genus Fucellia)
Photographer	@mshbd
Location	Natore, Bangladesh

Link to original community
https://www.inaturalist.org/observations/407075714

Latitude	Longitude	Map Link
24.3360	89.1130	https://www.openstreetmap.org/#map=12/24.3360/89.1130