ichthyoidal

from The Collaborative International Dictionary of English v.0.48

Ichthyoid \Ich"thy*oid\, Ichthyoidal \Ich`thy*oid"al\, a. [Gr.
   ?: 'ichqy`s, -y`os, a fish + e'i^dos form.] (Zool.)
   Somewhat like a fish; having some of the characteristics of
   fishes; -- said of some amphibians.
   [1913 Webster]