What's the difference between fishlike and ichthyic?

Fishlike

Definition:

• (a.) Like fish; suggestive of fish; having some of the qualities of fish.

Example Sentences:

• (1) These findings, together with her morning mucus sample having a strong fishlike odor, prompted us to suspect a metabolic problem.

Ichthyic

Definition:

• (a.) Like, or pertaining to, fishes.

Example Sentences:

• (1) The biochemical and serological characteristics of nonhemolytic group B streptococci of human, bovine, and ichthyic origin were described.