Clams were most numerous near the shoreline in 2-30 cm of water and decreased in abundance in deeper waters or where sand was replaced by mud or silt.
(Clams; were; most numerous near the shoreline) (Clams; decreased; L:in abundance; L:in deeper waters) (sand; was replaced; by mud or silt)
Clams Clams sand
were decreased was replaced
most numerous near the shoreline
L:in abundance L:in deeper waters
by mud or silt