A taxonomic family of fish characterized by cycloid scales, which have smooth, rounded edges.
From cycloid (circular/rounded) + -ei (Latin plural suffix). Named in 18th-century ichthyology from the appearance of their round-edged scales under magnification.
Cycloidei fish have scales that look like tiny circles overlapping like roof tiles—these smooth, rounded edges make them incredibly streamlined swimmers, which is why most fast fish like salmon and tuna belong to this group.
Complete word intelligence in one call. Free tier — 50 lookups/day.