Assertion: nurse shark's skin | /r/HasProperty | ridge
Facets:
value: on the great hammerhead
type: LOCATION
value: on the crowns of these denticles
type: LOCATION
Source sentences:
text: The skin of a shark is covered in dermal denticles(tooth like structures) and on the Great Hammerhead, there are ridges on the crowns of these denticles that help lead scented water to its nares (nostrils).