Kosher laws, or kashrut, are extensive. Here are the main rules in a simplied format.
Note: Kosher laws do not appliy to non-Jews.
Mammals - must have a split hoof and be a ruminant (it must chew its cud).
Fish - must have fins and scales
Birds - the laws are complicated, but in general, they must not be a scavenger or predator, and must have a societal tradition as a food animal, such as most poultry
Insects - there are 50 species of kosher locusts, but the names are lost in translation, so most Jews consider insects unkosher
Reptiles and Amphibians - are not kosher
Blood - must be completely removed from mammals and birds
Meat and dairy cannot touch or be cooked or eaten together
Fish and vegetables cannot be cooked together, but may be eaten together
Animal products - only milk, eggs, and other animal products of a kosher animal are kosher
Furthermore, there are complex laws about how the animal can be raised, slaughtered, and processed (including supervision of the processing), and what parts of the animal may be eaten.
Summary of unkosher animals eaten in societies where Jews live:
shellfish
catfish
shark
pork
rabbit
snake
alligator
Turtle
horsemeat
Animals that are not agreed upon by all Jewish authorities:
swordfish
sturgeon
ostrich
Turkey (only disagreed upon by an extremely small minority of Jews)
the 50 species of kosher locusts listed above
Foods that Jewish people cannot eat are known as 'non-kosher'.
no
No.
Judaism does not specify when people should eat.
Yes.
yes
some do
yes Jewish people eat at a table
It depends on whether the Jewish person likes celery or not.
The jewish people read readings from their bible and eat the same meals!
if it's kosher
Yes.