nurse shark
B2Technical (Biology/Zoology) / Semi-technical (Diving, Aquarium) / Informal
Definition
Meaning
A bottom-dwelling shark known for its docile nature and distinctive nasal barbels resembling a nurse's cap.
Any of several species of slow-moving, generally harmless sharks (family Ginglymostomatidae) found in warm coastal waters, often resting in groups during the day. Figuratively, it can denote something or someone perceived as benign but possessing latent power.
Linguistics
Semantic Notes
The term refers to the animal itself, not a function or role. The 'nurse' component is unrelated to caring for the young or nursing wounds; its etymology is debated (possibly from 'nusse,' an old word for a catfish).
Dialectal Variation
British vs American Usage
Differences
No significant differences in meaning. Spelling and usage are identical.
Connotations
Identical neutral-to-technical connotations in both varieties.
Frequency
Slightly more frequent in US English due to greater prevalence in Atlantic/Caribbean coastal media and tourism.
Vocabulary
Collocations
Grammar
Valency Patterns
[The] nurse shark [verb: rests/lies/hunts/feeds]Vocabulary
Synonyms
Strong
Neutral
Weak
Vocabulary
Antonyms
Phrases
Idioms & Phrases
- “As gentle as a nurse shark (informal, rare)”
Usage
Context Usage
Business
Rare. Might appear in ecotourism marketing: 'Swim safely with nurse sharks.'
Academic
Common in marine biology, zoology, and conservation texts.
Everyday
Used in travelogues, aquarium visits, and wildlife documentaries.
Technical
Precise species identification in ichthyology, fisheries science, and dive logs.
Examples
By Part of Speech
adjective
British English
- The nurse-shark population is stable in these waters.
- We studied nurse-shark behaviour.
American English
- The nurse shark population is stable in these waters.
- We studied nurse shark behavior.
Examples
By CEFR Level
- We saw a nurse shark at the aquarium.
- The nurse shark is not dangerous.
- The guide told us that nurse sharks often rest under rocks.
- Unlike other sharks, nurse sharks can pump water over their gills while stationary.
- Despite their docile reputation, a provoked nurse shark can inflict a serious bite.
- The conservation project monitors the local nurse shark breeding grounds.
- The phylogeny of the nurse shark suggests an ancient lineage within the Orectolobiformes order.
- Nurse sharks' dermal denticles provide a model for biomimetic research into drag reduction.
Learning
Memory Aids
Mnemonic
Imagine a nurse in a cap with two dangling strings (the shark's barbels) checking on patients on the seafloor.
Conceptual Metaphor
THE HARMLESS PREDATOR; DANGER IN REPOSE.
Watch out
Common Pitfalls
Translation Traps (for Russian speakers)
- Avoid direct translation ('акула-няня' is misleading). Use established term 'няньковая акула' or scientific name.
Common Mistakes
- Confusing it with 'grey nurse shark' (a different, more aggressive species in Australia).
- Using 'nurse' as a verb in this compound ('The shark nurses its young' is incorrect for this species).
Practice
Quiz
What is a distinguishing physical feature of most nurse sharks?
FAQ
Frequently Asked Questions
Generally no; they are slow-moving and not aggressive. However, like any wild animal, they can bite defensively if provoked or handled.
The etymology is uncertain. It may derive from the Old English 'hurse' or Middle English 'nusse' (meaning a type of dogfish or catfish), or from the sucking sound they make when feeding.
Yes. Unlike many sharks that require constant forward motion to pass water over their gills (ram ventilation), nurse sharks can actively pump water through their mouths and spiracles, allowing them to rest motionless.
No, this is a common confusion. The grey nurse shark (Carcharias taurus) is a different, more aggressive species, known as the sand tiger shark in other regions. The common nurse shark is Ginglymostoma cirratum.