A ghost crab is exhibiting a deposit-feeding mechanism. Deposit feeding is seen in crustaceans where the crabs ingest sand particles to feed on the organic matter in the sand (about 1% of the total sand consumed). Deposit feeding is very rapid in ghost crabs, they egest the inorganic or undigested matter through the oral cavity and leave visible pellets in the area. Any activity that is worth witnessing. The pellets are visible in this shot.
Deepak, India, Visakhapatnam