Are bats merely creatures that fly?
And God created [H1254] ... and every winged [H3671] fowl [H5775] after his kind [H4327]
H1254
בָּרָא
bârâ’
baw-raw'
A primitive root; (absolutely) to create; (qualified) to cut down (a wood), select, feed (as formative processes):—choose, create (creator), cut down, dispatch, do, make (fat).
H5775
עוֹף
‛ôph
ofe
From H5774; a bird (as covered with feathers, or rather as covering with wings), often collective:—bird, that flieth, flying, fowl.
H5774
עוּף
‛ûph
oof
A primitive root; to cover (with wings or obscurity); hence (as denominative from H5775) to fly; also (by implication of dimness) to faint (from the darkness of swooning):—brandish, be (wax) faint, flee away, fly (away—), X set, shine forth, weary.
H3671
כָּנָף
kânâph
kaw-nawf'
From H3670; an edge or extremity; specifically (of a bird or army) a wing, (of a garment or bed clothing) a flap, (of the earth) a quarter, (of a building) a pinnacle:— + bird, border, corner, end, feather [-ed], X flying, + (one an-) other, overspreading, X quarters, skirt, X sort, uttermost part, wing ([-ed]).
H4327
מִין
mı̂yn
meen
From an unused root meaning to portion out; a sort, that is, species:—kind. Compare H4480.
Note: the word species comes from the Latin and means: a sight, outward appearance, shape, form, sort, kind. Early biologists thus would have naturally equated species with kind, but later gave the word species a special meaning that undoubtedly was not what the author of Genesis 1 had in mind. This led many early Christian theologians and preachers to assume that God created all species (kinds) in the beginning in a “perfect” form which has never changed. Thus, later biologists rejected Genesis 1 when they found that their particular definition of species was not fixed but varied over time. The point is, of course, that it is not necessarily valid to assume that a modern definition of a word is the same as the definition used in the earliest scriptural documents.
This point may also apply to "creatures that live in the sea".