Found 2 Strong's definitions.

1. 1

   G2485: ἰχθύδιον (ichthýdion)

   diminutive from ἰχθύς; a petty fish:--little (small) fish.

   100%
2. 2

   G2486: ἰχθύς (ichthýs)

   of uncertain affinity; a fish:--fish.

   1%