The following is the translation of the given 'Bahasa' text to 'English' while preserving any html tags: "The name Sturgeon describes 29 species of fish from the Acipenseridae family. This species is considered endangered. The oldest sturgeon fossil dates back to the Middle Jurassic period (174-163.5 million years ago). It is believed to have evolved from a group of fish known as palaeonisciforms, which appeared 419 million years ago."

Ikan coelacanth adalah jenis ikan yang ditemukan di sekitar Kepulauan Comoro di lepas pantai tenggara Afrika dan Indonesia. Fosil coelacanth tertua yang diketahui berusia lebih dari 410 juta tahun.

Nautilus is known as a living fossil. They have been around for over 500 million years and have remained relatively unchanged. Early examples had straight shells, as found in the extinct genus Lituites.

The oldest surviving marine animal. Although it is uncertain when they first appeared in the world, fossils found in 2019 indicate that they are at least 890 million years old.