侏羅紀龍蝦住在菊石殼裡

http://www.wired.com/wiredscience/2012/03/prehistoric-lobsters-made-homes-of-ancient-ammonoid-shells/

Klompmaker, A., & Fraaije, R. (2012). Animal Behavior Frozen in Time: Gregarious Behavior of Early Jurassic Lobsters within an Ammonoid Body Chamber PLoS ONE, 7 (3) DOI:10.1371/journal.pone.0031893