Assertion: harbour porpoise | /r/HasProperty | kept
Facets:
value: worldwide
type: LOCATION
Source sentences:
text: At least 150 harbour porpoises have been kept worldwide, but only about 20 were actively caught for captivity.
text: The captive history is best documented from Denmark where about 100 harbour porpoises have been kept, most in the 1960s and 1970s.