Definition

Adjective: 1. Relating to fish with soft fins: Describing fish whose fins are composed of soft, flexible rays, typically without hard spines. This is a biological classification term.

Usage

• Used primarily in ichthyology (the study of fish) to categorize or describe a major group of fish.
• It often contrasts with "spiny-finned" fish.
• Example: "The herring is a classic example of a soft-finned fish."

Advanced Usage

• The term is often used in scientific or technical descriptions rather than everyday conversation.
• Example in a technical context: "The order Clupeiformes consists predominantly of soft-finned teleosts."

Variants and Related Words

• Malacopterygii (n): The former taxonomic group name for soft-finned fish, now largely superseded but still referenced historically.
• Spiny-finned (adj): The contrasting term for fish with hard, sharp spines in their fins.

Synonyms

• Malacopterygian (adj): A more technical synonym meaning "soft-finned."

Notes on Meaning

• The term specifically refers to the physical structure of the fins (soft rays) and not to the texture or behavior of the fish itself.
• It is an attributive adjective, most commonly placed before the noun it modifies (e.g., soft-finned fish).

Adjective

1. of or relating to fish with soft fins