There are multiple rare animals in Survival Craft: the White Bull, White Tiger, and Orca. Want to know where to find them?
White Bulls are found in colder areas [grassy, usually away from the icy shore line], usually away from other cattle herds. Because of their albino coloration, they are hard to spot in their environment. When they are killed, they drop 6-8 pieces of raw bacon, unlike brown and black bulls, who only drop 3-4. Unlike brown and black bulls, white bulls do not protect cows. So you don't have to worry about them charging at you for milking or killing cows. They are solitary animals, so you will usually only find 1 at a time.
White tigers are also found in cold, snowy areas, but unlike the white bulls, they are found in densely forested snowy areas, and even in the icy shorelines. They drop nothing when killed, but are dangerous. Just like orange tigers, they have the ability to jump 2 blocks high.
The orca is the biggest, most dangerous animal in Survival Craft. They are VERY hard to kill, and it should not be attempted. To find them, you must journey far out into the ocean. They are always found at the surface of the water, never deep down. This is because they are mammals, and breath air. They can be lured with meat-raw or cooked-and you can trap them [although you should probably try this in creative or harmless mode...]
Have fun searching for these rare animals. Hope this helped!!