Assertion: shark | /r/HasAspect | tough skin
Facets:
value: typically
type: DEGREE
Source sentences:
text: Though there are exceptions, sharks typically have a tough skin that is dull gray in colour and is roughened by toothlike scales .
text: A shark has tough skin that is covered by dermal denticles, which are small plates covered with enamel, similar to that found on our teeth.