The main character, Jonas Taylor, has aged 20 some years since this all started, he and his wife have an attraction like Sea World that is home to a Megalodon (giant prehistoric great white shark) and her pups.
Problems arise and people get eaten. This is a given seeing as it's a shark story.
David Taylor, Jonas' son, is offered a job by the United Arab Emirates to be a keeper of the younger Megs in their new state-of-the-art aquarium back in the Middle East.
These princes want more than just Megs as they desire to capture the largest prehistoric creatures they can find in the ocean's deep. David and his team of submersible pilots are tasked with retrieving them.
In this book you'll find lots of blood and underwater creature chases.
One of the problems with this novel is trying to pronounce all the names of the prehistoric monsters. I needed to look all of them up! And this distracted me from the story a bit.