nautiluses

/N AO1 T AH0 L AH0 S IH0 Z/
noun
  1. 1

    A marine mollusc, of the family Nautilidae native to the Pacific Ocean and Indian Ocean, which has tentacles and a spiral shell with a series of air-filled chambers, of which Nautilus is the type genus.

  2. 2

    A kind of diving bell that sinks or rises by means of compressed air.

Source: https://en.wiktionary.org/wiki/nautilus, https://en.wiktionary.org/wiki/nautiluses