(DSM# FK317) Extant genus - This epifaunal marine gastropod was highly mobile in its search for food. Epifaunal means that it lived either on the hard sea floor or on other hard-shelled organisms.
(DSM# M76) Extinct species - This species of Gyrodes (moon snail) was a relatively common predatory snail found in the Cretaceous Western Interior Seaway.
(DSM#10765) These Hadrosaur specimens were found in marine sediments which suggests the animal died and floated into the ocean before sinking and being preserved.
(DSM# 1085) Extinct genus - These calcareous tubes were once the home of sessile, soft-bodied marine worms. Sessile means that they are stationary and don't have means to move around on their own.