Definition

Noun: A leptocephalus is the slender, transparent, and ribbon-like larval stage of certain fish, most notably true eels (order Anguilliformes) and some related species like tarpon and bonefish. This larva is characterized by its flattened, leaf-shaped body and its nearly transparent nature.

Usage

The word leptocephalus is a specialized zoological term. It is used to refer specifically to this distinct larval form. * The leptocephalus stage can last for many months as the larva drifts with ocean currents. * Marine biologists study the leptocephalus to understand eel migration and life cycles.

Advanced Usage

• The plural form is leptocephali.
  • The net sample contained hundreds of leptocephali from various species.

Variants and Related Words

• Leptocephalic (adjective): Pertaining to or having the characteristics of a leptocephalus.
  • The leptocephalic stage is crucial for dispersal.

Synonyms

• Eel larva (This is a descriptive synonym but is less precise, as not all leptocephali are from true eels.)
• Glass eel (This refers to a later, post-larval stage when the eel becomes pigmented and less transparent, not the leptocephalus stage itself.)

Different Meanings

The term leptocephalus is highly specific to marine biology and ichthyology. It does not have common alternative meanings in general English.

Noun

1. slender transparent larva of eels and certain fishes