What lived in the ocean during the Cretaceous period?

Giant marine reptiles such as ichthyosaurs, mosasaurs, and plesiosaurs were common in the seas, and flying reptiles (pterosaurs) dominated the sky. Flowering plants (angiosperms) arose close to the beginning of the Cretaceous and became more abundant as the period progressed.

Which of the following was the top predator in the ocean during the Cretaceous?

lamniform sharks were the main predators in most shallow marine environments during the Cretaceous.

Could a human survive in the Cambrian?

If we used a time machine to travel back to a prehistoric period, the earliest we could survive would be the Cambrian (around 541 million years ago). Any earlier than that and there wouldn’t have been enough oxygen in the air to breathe.

What happened in the Cretaceous?

During the Cretaceous, accelerated plate collision caused mountains to build along the western margin of North America. As these mountains were rising, the Gulf of Mexico basin subsided, and seawater began to spread northward into the expanding western interior. Marine water also began to flood from the Arctic region.

What are the dangers of swimming in the ocean?

Swimmers must wear sunscreen and replenish it throughout the day, drink lots of water, and take breaks to sit in the shade. Ocean swimmers also share the water with divers and surfers. While divers won’t pose much of a threat, a surfboard can. Running into a surfboard can lead to serious injury, and in rare cases, death.

Where can I see Cretaceous marine life?

One of the best places to experience the full horror of Cretaceous marine life is Kansas. This may strike you as a little strange given that in the twenty first century this huge, flat area of land is about as far away from the sea as you can get in the USA.

Are jellyfish dangerous to swimmers?

Beaches with jellyfish issues will post warnings to help swimmers be aware of the threat. Some anemones also sting, as well as stingrays, sea slugs, and several species of fish. Some of these produce larvae and parasites that could leave a rash that could break out a full day after a swimmer leaves the water.

Are there snakes in the Cretaceous?

Snakes are another new addition to the world. On the dinosaur side of things the Cretaceous represents a time of enormous diversity. Hazards: In the ocean there are giant mosasaurs, smaller mosasaurs, Xiphactinus, sharks, giant squid and pliosaurs.