Sounds like "zapim" not "tsavim"
The letter ב can be both "b" and "v"
So its "b" here??
Can anyone explain why the ב becomes B instead of V?
It's not a very helpful answer, but at some ancient point in the language history the consonant was doubled, at least in some forms. For now, you just have to memorize it.
I don't really see the sense in learning words like turtles in a beginner's course.
Does Hebrew have different words for turtles and tortoises?
Not really, however the type that lives in water can be referred to as צב-ים
Sounds like a p not b..