A superorder or large grouping of fish that includes the Gadidae family and related families, characterized by cod-like morphology.
From Gadus (genus for cod) plus -oidea (a taxonomic suffix used for superorders or large groupings, derived from -oid meaning resembling).
Gadoidea represents a major evolutionary radiation—it's a superorder that includes not just cods but many other important fish families, and studying how these families relate shows us how fish diversified and conquered different ocean niches over millions of years.
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