Assertion: albacore's fin | /r/CapableOf | fold down into groove
Facets:
value: on their sides
type: LOCATION
Source sentences:
text: The first dorsal and first anal fins of all scombrids and billfishes, except swordfish, can fold down into grooves and the pectoral and pelvic fins into depressions when the fish is swimming rapidly.
text: Their fins fold down into grooves on their sides, turning them into silver bullets that can easily reach 50 miles per hour.