Sgùrr na Sgine has a subsidiary Top along its north eastern ridge called Faochag (The Whelk) which reaches a height of 909 metres.
This is in contrast to the mulberry whelk Morula marginalba which shares the same habitat but remains in an area where there are both crevices in which to hide and prey species on which to feed.
Terebralia palustris, the mangrove whelk, a species of brackish-water snail in the family Potamididae.
Shinnecock oral history ascribed the wampum market demise to a deadly red tide that decimated the whelk and quahog populations, though this cannot be true because a reduction in whelk and quahog populations would increase the scarcity and value of wampum.