Definition

Noun 1. An order of ray-finned fish: Anguilliformes is the scientific order comprising all true eels. These fish are characterized by their elongated, snake-like bodies and the absence or significant reduction of pelvic fins and their supporting girdle.

Usage

• The order Anguilliformes includes over 800 species, such as moray eels and freshwater eels.
• Marine biologists study the unique migratory patterns of fish within Anguilliformes.
• A key morphological feature defining Anguilliformes is the lack of pelvic fins.

Advanced Usage

• In taxonomic classification, Anguilliformes is often discussed in contrast to other eel-like fish orders (e.g., Saccopharyngiformes) which exhibit even more extreme anatomical reductions.
• The term is primarily used in scientific, zoological, and ichthyological contexts.

Variants and Related Words

• Anguilliform (adjective): Having the form or characteristics of an eel; belonging to the order Anguilliformes.
  • The anguilliform body plan is adapted for hiding in crevices.
• Eel (noun): The common name for a fish belonging to the order Anguilliformes.

Synonyms

• True eels (common name)
• Eel order (descriptive term)

Related Phrases / Compound Terms

• Order Anguilliformes: The full taxonomic designation.
• Anguilliform swimming: A specific, wave-like mode of locomotion characteristic of eels.

Noun

1. elongate fishes with pelvic fins and girdle absent or reduced