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Orca (Killer Whale) v Deinosuchus rugosus
Topic Started: May 5 2012, 11:04 PM (16,421 Views)
Taipan
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Orca (Killer Whale) - Orcinus orca
he killer whale (Orcinus orca), commonly referred to as the orca whale or orca, and less commonly as the blackfish, is a toothed whale belonging to the oceanic dolphin family. Killer whales are found in all oceans, from the frigid Arctic and Antarctic regions to tropical seas. Killer whales as a species have a diverse diet, although individual populations often specialize in particular types of prey. Some feed exclusively on fish, while others hunt marine mammals such as sea lions, seals, walruses and even large whales. Killer whales are regarded as apex predators, lacking natural predators. Killer whales distinctively bear a black back, white chest and sides, and a white patch above and behind the eye. Killer whales have a heavy and robust body with a large dorsal fin up to 2 metres (6.6 ft) tall. Behind the fin, they have a dark grey "saddle patch" across the back. Antarctic killer whales may have pale grey to nearly white backs. Adult killer whales are very distinctive and are not usually confused with any other sea creature. The killer whale's teeth are very strong and covered in enamel. Its jaws are a powerful gripping apparatus, as the upper teeth fall into the gaps between the lower teeth when the mouth is closed. The front teeth are inclined slightly forward and outward, thus allowing the killer whale to withstand powerful jerking movements from its prey while the middle and back teeth hold it firmly in place. Killer whales are the largest extant members of the dolphin family. Males typically range from 6 to 8 metres (20–26 ft) long and weigh in excess of 6 tonnes (5.9 long tons; 6.6 short tons). Females are smaller, generally ranging from 5 to 7 metres (16–23 ft) and weighing about 3 to 4 tonnes (3.0 to 3.9 long tons; 3.3 to 4.4 short tons). The largest male killer whale on record was 9.8 metres (32 ft), weighing over 10 tonnes (9.8 long tons; 11 short tons), while the largest female was 8.5 metres (28 ft), weighing 7.5 tonnes (7.4 long tons; 8.3 short tons).

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Deinosuchus rugosus
Deinosuchus is an extinct genus related to the alligator that lived 73 to 80 Ma (million years ago), during the late Cretaceous period. The name translates as "terrible crocodile" and is derived from the Greek deinos (δεινός), "terrible", and soukhos (σοῦχος), "crocodile". The first remains were discovered in North Carolina (United States) in the 1850s; the genus was named and described in 1909. Additional fragments were discovered in the 1940s and were later incorporated into an influential, though inaccurate, skull reconstruction at the American Museum of Natural History. Knowledge of Deinosuchus remains incomplete, but better cranial material found in recent years has expanded scientific understanding of this massive predator. Although Deinosuchus was far larger than any modern crocodile or alligator—measuring up to 12 m (39 ft) and weighing up to 8.5 metric tons (9.4 short tons)—in overall appearance it was fairly similar to its smaller relatives. It had large, robust teeth that were built for crushing, and its back was covered with thick hemispherical osteoderms. One study indicates that Deinosuchus may have lived for up to 50 years, growing at a rate similar to that of modern crocodilians, but maintaining this growth over a much longer period of time. Deinosuchus was probably capable of killing and eating large dinosaurs. It may have also fed upon sea turtles, fish, and other aquatic and terrestrial prey.

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DinosaurMichael
 
Orca vs Deinosuchus
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Lightning
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Sam1
Mar 28 2018, 06:56 PM
The orca would be far bigger(almost 3 times the weight) at equal lengths.
Yeah, I know that. I said that a crocodilian would be stronger and more durable than an orca at equal weights, not at equal lengths.
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Trish
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Deinosuchus VS. Killer Whale- I would go with Deinosuchus. While it would be hard to go against the killer Whale(orca) here because of its mobility advantage, I think the crocodile brings too much to the table here. It would be protected by its armored body, its bite would probably be deadlier, and I think it would have a weight advantage too. If they were at the same size I would slightly favor the whale but as it stands I back Deinosuchus to win. Edge to Deinosuchus.
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Cat
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Trish
Mar 29 2018, 08:15 AM
Deinosuchus VS. Killer Whale- I would go with Deinosuchus. While it would be hard to go against the killer Whale(orca) here because of its mobility advantage, I think the crocodile brings too much to the table here. It would be protected by its armored body, its bite would probably be deadlier, and I think it would have a weight advantage too. If they were at the same size I would slightly favor the whale but as it stands I back Deinosuchus to win. Edge to Deinosuchus.
Well, according to the OP it's the KW that has the weight advantage. As in the GWS vs Saltie thread, I favor orca in deep water and the croc in shallow water, even at parity. The jaws of the KW may look less impressive, but it has a speed advantage and it's intelligence would help the orca to exploit its own strengths.
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Lightning
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At average weights, the orca is the clear winner due to its great size advantage.

However, at parity, I'd favour the deinosuchus even in the open sea for reasons I stated earlier.
Hash Slinging Slasher
Mar 27 2018, 07:56 AM

At equal weights, I'd favour the deinosuchus, even in the open sea. It's armoured, more durable and has a more formidable bite.

Also, orcas seem to take several hours to kill large animals. I know that the baleen whale calves that orcas hunt are larger than them but, usually, several orcas take part in these hunts and they still take several hours to kill. And isn't there also an account of 2 male orcas taking hours to kill a 8 metre whale shark which probably wasn't much larger than them?

Nile crocodiles, on the other hand, kill zebras and wildebeest (which aren't much smaller than the average crocodile) within minutes or seconds and a crocodile even killed a giraffe on land:

https://youtu.be/_tWYu8VjPGw

Since the deinosuchus can twist it's body, whereas the orca needs to turn its entire body, I don't think the deinosuchus would have much trouble catching the orca.

Also, if an 80 year old, 3-legged croc (which is definitely much slower than a prime aged, fully healthy croc) can catch a bull shark which is much smaller and swifter than himself, then a deinosuchus should be able to bite a similar sized orca when it comes close.

https://www.telegraph.co.uk/news/worldnews/australiaandthepacific/australia/11015385/Jaws-vs-Claws-Crocodile-wrestles-bull-shark-in-Australian-river.html

I know rivers can be shallow and murky but this shark is small and bull sharks have really good eyesight, so it could likely see and move around properly.

Orca's intelligence will not be of much help here imo. Orcas can do tonic immobility on sharks because they coexisted with them for millions of years. However, the average orca has never seen a crocodile before. The orca wouldn't be able to work out the deinosuchus' weakness just by looking at it.

And the orca's behaviour will also play a part in its downfall imo. Orcas do not kill prey straightaway. Rather, they play around and have fun. For example, head butting or tail swinging at seals when they could much more easily kill it with bite. Or trying to drown a baleen whale calf when they'd be able to kill it quicker if they just kept biting it. If the orca tried to have fun with a deinocuchus, it could be a fatal mistake.

These reasons . . .
Edited by Lightning, Mar 29 2018, 09:26 AM.
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