Arrowheads (Alien Worlds: Your Guide to Extraterrestrial Life)

The arrowhead is a species of aquatic carnivore similar in some ways to earths sharks as-well as earths whales. Their head is shaped like an arrow which gives them their name, at the side of both arrows rests the beasts eyes that are black and hardened, this head also holds their gills and mouth.They can weigh up to 100 tons and are 70 feet long with teeth as large as 14 inches.They are native to the planet Siluriana, a planet with almost no land save for a few volcanoes, this planet resembles earth 450 million years ago and har a host of unique and vaguely familiar species.

Please help me spread awareness for this obscure book
This is from the book Alien Worlds: Your Guide to Extraterrestrial Life an obscure book that doesn't even have a wikipedia page, it shows many interesting and unique alien species that i quite loved, some juicy info of just a handful of creatures shown in this book is here