Blenny and Blennioid

Blenny noun - Small usually scaleless fishes with comb-like teeth living about rocky shores; are territorial and live in holes between rocks.

Blennioid and blenny are semantically related. In some cases you can use "Blennioid" instead a noun "Blenny".

Blennioid noun - Elongated mostly scaleless marine fishes with large pectoral fins and reduced pelvic fins.

Blenny and blennioid are semantically related. Sometimes you can replace term "Blenny" with "Blennioid", this nouns are similar.