like sardines

abundant dense full impenetrable tight

close compact great rank solid

brimming bristling bursting chock-full compressed concentrated condensed considerable covered crammed crawling with frequent heaped impervious inspissated localized multitudinous numerous populated populous profuse replete several swarming teeming

open sparse thin

loose

attenuated clear diluted intelligent reasonable sensible slight smart uncrowded unfriendly unsociable watery wise