 Nautiloids, exemplified by modern nautiluses, are conversely thought to have had a reproductive strategy in which eggs were laid in smaller batches many times during the lifespan, and on the sea floor well away from any direct effects of such a bolide strike, and thus survived.Many ammonite species were filter-feeders, so they might have been particularly susceptible to marine faunal turnovers and climatic change.There have been reliable reports of ammonite fossils from the early Paleocene.