Question

Many marine organisms defend themselves from predators, using a dark ink-like pigment secreted from an inch-long sac attached to their epidermis. A fossil from the jurassic period, dated at almost 155 million years old and discovered in the wiltshire region, contains a perfectly-preserved ink-sac that was probably from a now-extinct species of squid, the belemnotheutis antiquus, whose exact origins had not been previously established. Therefore, this form of self-preservation in marine organisms is at least 155 million years old.

Answer 1

yes you are correct all the terristrial animals present in this world are derived from oceans and the marine animals came from land . you wouldn't believe that the dolphins ansesters are rats . for more information visit Wikipedia

thank you

please mark as brainiest