I did those concept art at Jellyfish Pictures for the BBC/Apple TV+ PREHISTORIC PLANET documentary for the COASTS episode.
It follows a male Tyrannosaurus Rex and it's younglings swimming accross a shallow sea to reach an Archelons nesting ground. It's a dangerous prospect as they quickly get the attention of a Mosasaur.
The swimming Trex piece also ended up inspiring the promotionnal poster.
Art Director : Tom Brass