Interspecies Conflict/Species conflicting
Doedicurus clavicaudatus vs Euoplocephalus tutus
6 sea otters vs california sea lion
Giant Moray vs Great Barracuda
Mosasaurus hoffmannii vs Pliosaurus funkei
warthog vs 2 deinonychus
Walrus vs Narwhal
Pygmy hippopotamus vs black bear
giant otter vs sea lion at parity
North Pacific giant octopus vs Spectacled caiman
california sea lion vs common bottlenoese dolphin
Why don't larger whales have a prominent dorsal fin?
can you rate the amount of protection of these animal's hides?
Doedicurus clavicaudatus vs Euoplocephalus tutus: Euoplocephalus weighed about 1/3rd more than Doedicurus. Doedicurus was kin to the Glyptodon (glytodonts resembled giant armadillos), but was about 40% heavier. It was covered with a domelike shell, and its armored tail was tipped with a spiked club. Euoplocephalus was an ankylosaur (armored reptile), and was armed with a club of bone at the end of its tail (to swing at attackers with great force). Both of these well-protected animals would have found it difficult to injure one another, but it could be done. The spiked club of Doedicurus would have been able to penetrate some areas on the ankylosaur's body, and the club of bone employed by Euoplocephalus may have stunned the smaller glyptodont with a strong impact against its shell (and a strike to the head may have dispatched it). Doedicurus was a slow animal (short legs/heavy body), and would have been unable to land as many strikes as the larger, more mobile Euoplocephalus. It's unlikely one animal would actually finish the other, but the ankylosaur would probably bully the glyptodont into a retreat. Edge to Euoplocephalus tutus.
6 Sea otters vs California sea lion: The California sea lion can weigh twice as much as all 6 sea otters combined. Sea otter have great mobility in the water, and have strong jaws & teeth. The California sea lion has great mobility as well (not quite the same level as the smaller otters), and can reach 25mph when swimming. The otters can certainly harass the larger mammal, but it's unlikely they will have the know-how to successfully defeat an animal of this size & mobility. The otters will put themselves in danger upon approach (a counter-bite from the sea lion can injure an otter), and the otters' bites will only have effect after many are landed. Edge to California sea lion.
Giant Moray vs Great Barracuda: The barracuda will typically be heavier than the eel (as much as 50%). The moray eel will have a definite advantage in maneuverability, but the barracuda is capable of short bursts of speed that will give it a chance to strike first. Both animals have formidable jaws, but the bite of the barracuda will probably cause more damage to the eel's body than the eel's bite will cause to the barracuda. With a size, bite & durability advantage, the barracuda will likely overcome the moray eel's mobility advantage more times than not. A parity fight would be close, but the barracuda has the edge at these weights. Great barracuda wins.
Mosasaurus hoffmannii vs Pliosaurus funkei: The largest mosasuars weighed as much as 2 elephants, but Pliosaurus funkei (also known as Predator X) weighed at least twice that (with some estimations as high as 6 elephants). Mosasaurus had the edge in mobility, but the pliosaur likely had a much stronger bite force (and was better suited to tackle larger prey items/adversaries). The pliosaur would have the edge at parity, and any weight advantage would widen the gap. Pliosaurus funkei wins.
Warthog vs 2 Deinonychuses: The warthog will weigh as much as the 2 Deinonychuses combined. Teamwork will be the name of the game here. Deinonychuses were accustomed to working together to dispatch a common foe, and their coordinated attacks would certainly disorient the warthog. Warthogs are dangerous combatants (long tusks, decent mobility), but the Deinonychuses would eventually wear it down with slashing kicks and multiple bites (and could easily jump onto the suid). 2 Deinonychuises win.
Walrus vs Narwhal: The walrus will typically be slightly heavier (around 15%) than the narwals. The narwhal has a long tusk (sometimes 9ft long) that looks more intimidating than it really is. It's actually an overgrown tooth, and its used for "sparring" with other males by rubbing them together (and not stabbing). The mobility of the walrus would be good enough to enable it to impale the narwhal with its 3ft tusks, and its tough hide would likely afford it some protection against any inadvertent stab by the narwhal. Walrus wins.
Pygmy hippopotamus vs Black bear: The pygmy hippopotamus will be slightly heavier than the black bear. Pygmy hippos aren't as formidable for their size as their larger, more aggressive/combatant counterparts (river hippopotamus), but they still possess a dangerous bite. Black bears have forelimbs that can be used to hold/control or swipe, and a decent bite of their own. The pygmy hippo's bite can certainly injure the black bear, but the bear should be able to control the positioning on some occasions to keep itself safe while mounting its own offense. A realistic encounter would likely see the ursid retreating once the pygmy hippo began putting up any resistance, but a determined (and cautious) black bear will have the weaponry (especially paw swipes) to succeed. The bear's high level of stamina will be an asset in a prolonged struggle. Edge to black bear.
Giant otter vs Sea lion (at parity): Hard to say with this one. The otter will have the edge in maneuverability, and the sea lion will probably have the better bite. Close to 50/50.
North Pacific giant octopus vs Spectacled caiman: The octopus can be close to double the caiman's weight. The caiman's jaws & teeth are made for gripping (and not tearing), and that will be a disadvantage for it. Unless the caiman lands an initial bite to the cephalopod's head (which might disable it), it will be wrapped up & incapacitated. The 8 tentacles of the octopus will hold the caiman in place until it drowns (as its hide will offer some protection from the sharp beak). North Pacific giant octopus wins.
California sea lion vs Common bottlenose dolphin: The dolphins will weigh almost 30% more than the sea lion. The sea lion will have a slight edge in mobility, but it won't be great enough to avoid every charge (ramming attack) by the dolphin. The California sea lion has a decent bite, but this asset won't be as effective against the larger dolphin as the dolphin's arsenal will be against it. Edge to dolphin.
Q: Why don't larger whales have a prominent dorsal fin?
A: They don't need them. Dorsal fins are primarily for stabilizing the animal at higher speeds, and most larger whales are relatively slow.
Rating of hide protection; approximate (1-10):
armadillo - 10
hedgehog - 8
porcupine - 10
elephant seal - 5
komodo dragon - 7