Definition

Describing a type of tail fin where the upper part is bigger than the lower part, and the backbone extends into the upper part, commonly seen in sharks.

Example

Sharks have a heterocercal tail that helps them swim efficiently.

Conversation

Did you know that some fish have a heterocercal tail fin?

Really? I always thought tails were pretty similar in shape.

Yeah, it's interesting how the upper lobe is larger than the lower one.

That must help them swim better, right?

Synonyms & Antonyms

Root Explanation

Heterocercal → It is formed from "hetero-" (from Greek "heteros", meaning different) and "cercus" (from Greek "kerkos", meaning tail). The term describes a type of tail that is different in shape or structure, typically found in certain fish species.

Memory Tip

Think of 'different' ('hetero-') tails ('cercus') when remembering that 'heterocercal' refers to a tail that is not symmetrical.

Visually Confused Words