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ArtistStriking macro portrait of Mahatha regina partially concealed under root-mat debris at a forest seep, dappled leaf light on its carapace. Composition: square macro with crab lower-right, leaf-litter and root-lines leading eye into scene. Lighting: mottled canopy light with soft warm specular highlights and green shadow fill. Palette: rusty-brown carapace, golden leaf-litter, deep forest green. Texture & detail: shell grain, tiny water droplets, root-fiber texture. Artist-mix: Audubon natural-history detail , modern documentary warmth. Camera: macro 100mm stack; 4k output. Variations: series showing microhabitat restoration steps and community-conservation messaging.
**Mahatha (Freshwater Crab)
Scientific name: Mahatha regina
Article (short):
Part of a surprising diversity of freshwater crabs in Sri Lanka, Mahatha regina lives at the edge of seep zones and small forest seeps. These crabs are tiny engineers of the streambank - their decline signals shifting watersheds and land-use change that affect people as much as wildlife.
Quick facts
Status (approx.): Critically Endangered / micro-endemic.
Range: Select forest streams and seepages across Sri Lanka (very small ranges per species).
Habitat: Moist root-mats and forest seep margins.
Diet: Detritus, algae, small invertebrates.
Lifespan: Several years typical for freshwater species.
Reproduction: Brooded eggs; larval/juvenile stage dependent on stream stability.
Ecological role: Stream nutrient cycling, prey base for small predators.
Main threats: Watershed degradation, pollution, deforestation, invasive species.