Jurassic Era (Part one) : the ocean

At the beginning, the continent, Pangaea, began to separate significantly for the first time. This may have given cause to the mass extinction, as the separation would have triggered a great deal of volcanic activity. As the tectonic shift took place, several rifts were formed and filled with water, forming, what would later become many of today's oceans and seas. These "oceans" were small and shallow giving way to an excellent, warm, tropical climate. Many coral reefs were formed and life, in general, thrived.

Sources and more informations :

Peronidella - https://www.mindat.org/taxon-P3689.html
Thecosmilia - http://fossilworks.org/bridge.pl?a=taxonInfo&taxon_no=6932
Thamnasteria - https://www.mindat.org/taxon-P6921.html
Isastrea - https://science.mnhn.fr/taxon/genus/isastrea?lang=fr_FR
Spiriferina - https://www.mindat.org/taxon-10368138.html
Homeorhynchia - http://fossilworks.org/bridge.pl?a=taxonInfo&taxon_no=28591
Eutrephoceras - https://www.mindat.org/taxon-4624542.html
Stephanoceras - https://en.wikipedia.org/wiki/Stephanoceras
Dactylioceras - https://www.mindat.org/taxon-4626004.html
Phylloceras - https://www.mindat.org/taxon-4622352.html
Lytoceras - https://en.wikipedia.org/wiki/Lytoceras
Cylindroteuthis - https://en.wikipedia.org/wiki/Cylindroteuthis
Gryphaea - https://www.mindat.org/taxon-8654246.html
Pleuromya - https://www.mindat.org/taxon-4587074.html
Myophorella - https://www.mindat.org/taxon-8023876.html
Modiolus - https://www.mindat.org/taxon-2285647.html
Pleurotomaria - https://www.mindat.org/taxon-9092756.html
Pentacrinites - https://en.wikipedia.org/wiki/Pentacrinites
Apiocrinites - https://www.mindat.org/taxon-4873544.html
Palaeocoma - http://fossilworks.org/bridge.pl?a=taxonInfo&taxon_no=31583
Pentasteria - https://www.wikiwand.com/en/Pentasteria
Hemicidaris - https://www.mindat.org/taxon-4875067.html
Libellulium - https://en.wikipedia.org/wiki/Libellulium
Mesolimulus - http://www.fossilmuseum.net/Fossil_Sites/solnhofen/Mesolimulus-walchi/Mesolimulus.htm
Eryma - http://fossilworks.org/bridge.pl?a=taxonInfo&taxon_no=22426
Hybodus - http://www.prehistoric-wildlife.com/species/h/hybodus.html
Ischyodus - https://pubs.er.usgs.gov/publication/70031431
Leedsichthys - http://www.prehistoric-wildlife.com/species/l/leedsichthys.html
Leptolepides - https://www.mindat.org/taxon-4838902.html
Prosalirus - https://www.researchgate.net/figure/Prosalirus-bitis-the-earliest-known-anuran-from-the-Early-Jurassic-of-Arizona-USA-a_fig1_259080631
Eocaecilia - http://www.prehistoric-wildlife.com/species/e/eocaecilia.html
Karaurus - https://www.mindat.org/taxon-4816444.html
Kayentachelys - http://www.prehistoric-wildlife.com/species/k/kayentachelys.html
Pleurosaurus - https://eartharchives.org/articles/pleurosaurus-the-jurassic-marine-dwelling-relative-of-the-tuatara/index.html
Plesiosaurus - https://www.britannica.com/animal/Plesiosaurus
Liopleurodon - https://www.thoughtco.com/things-to-know-liopleurodon-1093791
Ichthyosaurus - http://www.prehistoric-wildlife.com/species/i/ichthyosaurus.html
Stenopterygius - http://www.prehistoric-wildlife.com/species/s/stenopterygius.html
Protosuchus - http://www.prehistoric-wildlife.com/species/p/protosuchus.html
Steneosaurus - https://www.britannica.com/animal/Steneosaurus
Dakosaurus - https://www.newdinosaurs.com/dakosaurus/
Geosaurus - http://www.prehistoric-wildlife.com/species/g/geosaurus.html

Music, Dreamer by Hazy cinematic
Thumbnail : Gabriel N.U.

0:00 Jurassic conditions
1:52 Invertebrates
13:48 Arthropods
15:37 Vertebrates
19:57 Amphibians
21:44 Reptiles