Back in the days of Noah, of whom we are all related to, he knew which animals were identified as clean and unclean: "Of every clean beast thou shalt take to thee by sevens, the male and his female: and of beasts that [are] not clean by two, the male and his female" (Genesis 7:2). Depending upon the classification, pretty sure frogs do none of these things: "Nevertheless these shall ye not eat of them that chew the cud, or of them that divide the hoof: [as] the camel, because he cheweth the cud, but divideth not the hoof;" therefore "he [is] unclean unto you" (Leviticus 11:4). And being a water creature, "fins and scales" are required (Leviticus 11:9).