👉 Thraustochytridae is a class of extinct marine crustaceans, known for their unique and widespread distribution across the world's oceans. They were characterized by their large size (up to 10 meters in length) and the ability to grow to several times their body length through appendages like claws or tentacles. These animals lived during the Late Cretaceous period, which spans approximately 259 million years ago, and are believed to have been a diverse group