Fish
An, unfortunately, unranked collection of chordates with similar attributes. Fish are instantly recognisable to all and sundry. Where a Rhyncosaur could be possibly mistaken for a Home Earth Hippopotamus, few are going to make similar mistakes about the main denizens of the ocean. Big and small, bright and colourful, predatory or herbivorous, fish are iconic among Diff. researchers who, up until that moment had had to deal with a bizarre world where Komodo Dragon-sized lizards are liable to launch themselves out of trees and glide silently down at you, birds have mastered the Cheshire Cat's grin, and little mice like animals regularly practice the art of projectile defecating, a skill they have gotten down to a fine art and pinpoint accuracy. The denizens of oceans, rivers and lakes seemed like a slice of normality in a cake of oddities, terror and frequent, frantic washing of clothes.
Of course, like much 'normality' of this world, much of it disappeared when they took a closer look at it. Only in Different World can one see sharks with nasal 'horns' derived from the jaw that they use to gash large holes in the sides of prey. Only in Different World can one see sharks that happily beach themselves in pursuit of prey, before leisurely reversing into the water via well developed pectoral fins. Only in Different World can one see a fish happily swing its bottom jaw open to an astonishing 180 degrees, or catch a seemingly innocuous haddock like fish in a net, only to discover that it immediately begins secreting a solution that realeases a vapour so foul it would have a Striped Skunk running from the stench. Only in Different World, could exist a creature so terrifying as the Hai-Ho-Shang.
Agnatha - Lampreys, lamperns
Chondricthyes - Sharks, Rays, Chimaeras
Actinopterygii - Bony fish
Sarcopterygii - Coelacanths and the Hai-Ho-Shang
Of course, like much 'normality' of this world, much of it disappeared when they took a closer look at it. Only in Different World can one see sharks with nasal 'horns' derived from the jaw that they use to gash large holes in the sides of prey. Only in Different World can one see sharks that happily beach themselves in pursuit of prey, before leisurely reversing into the water via well developed pectoral fins. Only in Different World can one see a fish happily swing its bottom jaw open to an astonishing 180 degrees, or catch a seemingly innocuous haddock like fish in a net, only to discover that it immediately begins secreting a solution that realeases a vapour so foul it would have a Striped Skunk running from the stench. Only in Different World, could exist a creature so terrifying as the Hai-Ho-Shang.
Agnatha - Lampreys, lamperns
Chondricthyes - Sharks, Rays, Chimaeras
Actinopterygii - Bony fish
Sarcopterygii - Coelacanths and the Hai-Ho-Shang