MadSci Network: Zoology
Query:

Re: Sharks and Crocodiles. Who would win in a battle a 14ft. crocodile or a 14f

Date: Tue Oct 9 19:01:09 2001
Posted By: Alastair Lyon, Science Information Officer
Area of science: Zoology
ID: 1001634746.Zo
Message:

Hi Eric,

Salt water crocs are pretty mean! In fact, a salt water crocodile is the 
*only* living animal that considers people to be on the menu. Given the 
chance, they'll grab you from the river bank and drown you; and eat you 
later.

Across Northern Australia, crocs do move out of rivers and into the sea 
for a few different reasons. Naturally, the croc may encounter sharks of 
different species and sizes, but it is unlikely that either would engage 
each other.

Sharks are attracted to blood in the water, and tend to take on 
easy targets. Crocodiles also prefer  easy targets, and because they can 
slow their metabolism right down, so if conditions or prey is not "just 
right", they'll kick back and wait for better pickings tomorrow...or the 
next day; or even the next month. There's never any hurry to eat being a 
crocodile.

However, if, by chance, a large tiger shark and a large crocodile did have 
a go at each other, I guess I'd still put my money on the croc.  Having 
worked with crocs, I reckon the crocodile has better resources at its 
disposal. But it difficult to decide. Crocs are ambush predators (ie. sit 
and wait for an attack), sharks are opportunist predators that charge at 
targets.

Sorry that I haven't answered your question directly. Crocodiles and 
sharks can occaisionaly move into each other's territory. But they are 
only visitors to each other's area and don't really "co-exist", as such.
It is VERY unlikely that similar sized, healthy animals would take each 
other on, and even harder to predict the outcome. Big, male crocs (bulls) 
don't tolerate other male crocs in their areas and will often fight really 
really hard. But I think a large male croc would hardly bother with a 
shark entering his territory. Sharks, on the other hand, are much less 
territorial, and I doubt that they would seek to evict a travelling 
crocodile.

Great Whites are extremely unlikely to ever encounter a crocodile - Great 
Whites live in temperate waters - crocodiles are tropical animals (they 
need warmth to get their muscles moving. They're very sluggish in cold 
weather). Tiger sharks may occaisionaly bounce into a croc, but I don't 
think they'd notice each other. Bull Sharks do sometimes work their way 
into estuaries (crocodile habitat), but I still feel that a crocodile 
would be more concerned with what his rival crocodiles are up to, and what 
is paddling along the bank (ie. possible food) than a shark in his river.

Hope this helps.

cheers,

Alastair





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