Body length
InferredAbout 10 m (museum reference)
The museum gives an approximate reconstructed length. The reference does not identify a maturity-tested adult or a population range. [D1]
EXHIBIT 15
Baryonyx
Baryonyx
A Baryonyx fossil preserved fish scales and dinosaur bones in its abdominal region.
TWO WAYS TO PICTURE THE PAST
Science & the silver screen
Compare the evidence with the familiar movie image. The illustrations are not to a shared scale.
01 / SCIENTIFIC RECONSTRUCTION
An animal, reconstructed
Image unavailableBaryonyx walkeri life reconstruction by PaleoGeekSquared. Long rosette-tipped snout, set-back nostrils, rounded teeth and an enlarged thumb claw.This scientific picture needs an internet connection. Its source link and image notes remain available.
The artist identifies this reconstruction as Baryonyx walkeri. This view illustrates one form within the genus, rather than every species or individual. Fossil-informed anatomy: Long rosette-tipped snout, set-back nostrils, rounded teeth and an enlarged thumb claw. Coloration and some soft tissues are interpretive; species reconstruction represents the genus. [1] [2] [3]
Baryonyx walkeri by PaleoGeek.png — PaleoGeekSquared. CC BY-SA 4.0. Remote source artwork displayed without additional cropping; Wikimedia supplies any display-size derivative.
Scientific picture served by Wikimedia · internet connection required.
02 / MOVIE-STYLE INTERPRETATION
A cinematic imagination
Image unavailableOriginal cinematic Baryonyx picture: Cinematic Baryonyx with an elongated crocodile-like head and enlarged thumb claws; keep strong forelimbs and artistic coloring.The exhibit and its image notes remain available.
Cinematic Baryonyx with an elongated crocodile-like head and enlarged thumb claws; keep strong forelimbs and artistic coloring. Dramatic lighting, surface detail and scenery are artistic choices. This is an original cinema-inspired picture, rather than a frame from a film or a documented fossil locality.
Original artwork · artistic interpretation.
Scientific view: credited paleoart interpreting fossil evidence, served online by Wikimedia. Movie-style view: Original artistic interpretation. Colors, soft tissues and settings involve reconstruction.
PERIODEarly Cretaceous[1]
DIETCarnivoreEvidence-informed classification [1]
TOTAL LENGTHNot established hereComparable estimate unavailable
FOSSILS FOUNDUnited Kingdom, Spain[1]
MEET THE ANIMAL
Meet Baryonyx
Baryonyx was a large Early Cretaceous predatory dinosaur discovered in Surrey, England. Finding an enormous claw bone in a claypit in 1983 led to the discovery of a much more substantial skeleton. The original scientific description emphasized a combination of familiar predatory-dinosaur features and unusual anatomy. An isolated find could therefore become the starting point for recognizing a dinosaur that researchers had not previously understood. [S1]
Its long snout and tooth arrangement distinguish it from the deeper heads of many other large predators. Research comparing spinosaur jaws links these features with feeding, including taking fish. Food remains found in the apparent stomach region of Baryonyx also include a small plant-eating dinosaur. That evidence indicates that fish were not necessarily its only food, while it cannot by itself reveal whether the dinosaur meat was hunted or scavenged. [S2]
The claw is real, but proposals about exactly how it was used remain interpretations. Comparative studies consider the powerful arms and jaws together when discussing food handling. They offer testable explanations of feeding capability rather than a complete record of a meal. Specific nests, courtship displays and parenting remain unresolved in the evidence reviewed here. [S2]
Overview sources
- Baryonyx, a remarkable new theropod dinosaurNature · Accessed 2026-10-04Inspected: abstract
- Prey size and ecological separation in spinosaurid theropods based on heterodonty and rostrum shapeThe Anatomical Record; Wiley · Accessed 2026-10-04Inspected: excerpt
PREHISTORIC ANIMAL DOSSIER
A life in profile.
The animal, the evidence, and the questions still open.
Baryonyx is a spinosaur with a long snout, conical teeth and an enlarged thumb claw. Food remains associated with its principal skeleton include fish scales and herbivorous dinosaur bones, indicating a broader diet than fish alone.
Profile scope: Genus — Baryonyx; principal specimen concerns B. walkeri
- Time
- Early Cretaceous
- Fossil locations in this exhibit
- United Kingdom, Spain
How to read the evidence
Source supported identifies a description documented by the cited source. Inferred marks a reconstruction or functional estimate. Debated marks competing interpretations. Not established means the sources reviewed for this dossier do not support a firm conclusion; it does not mean a behavior never occurred.
A size reference is an estimate, not a population range. Nesting evidence does not by itself establish courtship, mate choice, or lifelong pairing.
Body mass
InferredAbout 2 tonnes (museum reference)
The profile lists a rounded 2,000 kg reconstruction estimate. Its method and life stage are not specified. [D1]
Diet and feeding
Source supportedFish and other dinosaur remains
Fish scales and Iguanodon bones were found in the skeleton's apparent stomach region. Those remains support mixed feeding but do not distinguish hunting from scavenging. [D2]
Habitat and setting
Source supportedEarly Cretaceous Europe
The museum lists fossils from England and Spain. This establishes regional occurrence rather than a verified preference for one waterside habitat. [D1]
Movement
Source supportedTwo-legged terrestrial movement
The museum describes a bipedal animal. The inspected account's wading reconstruction does not establish detailed underwater performance. [D1] [D2]
Distinctive anatomy
Source supportedLong snout, conical teeth, enlarged thumb claw
The discovered claw bone measured roughly 31 cm along its outer curve. That measurement concerns a preserved claw, not the length of a complete keratin-covered claw. [D2]
Reproduction & life together
Reproduction and nesting
Not establishedNot established here
Reviewed sources do not establish Baryonyx clutch size, nest architecture or parental care.
Mating and courtship
Not establishedNot established here
Reviewed sources do not establish Baryonyx mating displays, posture or courtship sequence.
Social behaviour
Not establishedNot established here
Reviewed sources do not establish Baryonyx group size or coordinated hunting behaviour.
Dossier research & sources
Sources and inspection notes for the claims in this profile.
- BaryonyxNatural History Museum, London · Accessed 2026-10-02Genus size references, bipedal movement and fossil regions · Inspected: page
- How did Baryonyx change what we knew about spinosaurs?Natural History Museum, London · Accessed 2026-10-02Museum account of B. walkeri discovery, anatomy and associated food remains · Inspected: page
THE STORY IN THE FOSSILS
Meet Baryonyx.
The Surrey discovery included a curved claw bone about 31 centimetres long. A keratin sheath would have enlarged it in life. The skull has set-back nostrils, a widened snout tip and rounded tooth cross sections, features interpreted as useful for catching fish. [1] [2]
Fish scales and Iguanodon bones in the abdominal region indicate a varied meal. Its fossils occur in the Wealden Group, associated with rivers and swampy lagoons. Researchers debate whether Baryonyx chiefly caught prey from shorelines or also submerged itself while foraging. [2] [3]
A note on scale and time
We have not established a comparable adult total-length estimate for this taxon in this draft. Specimen measurements in the text describe those individuals. The cited dates are approximately 125 million years ago. Published genus-level educational dating; not a specimen age. Unknown does not mean zero.
Sources & editorial notes
Sources and evidence notes for this exhibit.
- Baryonyx — Dino DirectoryNatural History Museum, London · Accessed 2026-10-02Dino facts; claw; taxonomy, lines 67–103. Genus educational measurements not adult-scoped; claw-fishing behavior is an inference.
- How did Baryonyx change what we knew about spinosaurs?Natural History Museum, London · Accessed 2026-10-02Museum feature sections on claw, distinctive skull, abdominal remains, Wealden habitat and relationships, lines 89–143. 2019 ecology interpretation superseded by later debate.
- Spinosaurus and Baryonyx may have hunted fish underwaterNatural History Museum, London · Accessed 2026-10-022022 museum report sections on spinosaur bone density and limitations, lines 67–121. Behavioral classification inferred from density; does not settle swimming debate.
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