Fleas belong to the Order Siphonaptera.What do fleas look like?
Size:
0.5 mm – 10 mm in length but most are shorter than 5 mm.
Body:
Very thin as if pressed from the sides.
Covered with hairs and spines directed backwards, some in comb-like formations.
Appears hard.
Antennae:
Very short, held in a groove hence often difficult to see.
Never longer than body.
Eyes:
Very small or absent.
Mouthparts:
For piercing and sucking.
Wings:
Absent.