Portrait from the MythBranch atlas
Interpretive illustration, not an ancient likeness
Greek mythology research profile · cited sources
Hydra · Multiplying danger and the problem of shared labor
The Lernaean Hydra is the many-headed serpent of the marsh at Lerna, child of Typhon and Echidna and opponent in Heracles' second labor. Cutting one head produces more; one may be immortal; breath and blood are poisonous. The monster turns straightforward force into a problem of method. Heracles needs Iolaus to cauterize each wound, then uses the Hydra's venom on arrows that carry the labor's harm into later stories.
Identity & cult
Names · attributes · ancient evidence
Hydra means water snake, and the Lernaean name locates the monster in a wet Argive landscape associated with springs and underworld depth. Ancient sources give different numbers of heads; the variation emphasizes regenerative multiplicity rather than a fixed anatomy. Vase painters devised bodies that remain legible while Heracles and Iolaus attack at different points. Some later images add claws and produce a more generally draconic form.
The modern word hydra describes any problem that grows when attacked, a metaphor already available in political and literary reception. Biological Hydra received its scientific name from regenerative powers that seem mythically apt. Those later uses are meaningful but distinct from the offspring of Typhon and Echidna. The page also avoids treating the mythical venom as a realistic zoological substance.
Heracles cannot solve regeneration by cutting faster. Iolaus burns the necks while the hero attacks. Eurystheus later refuses to count the labor because of this help. The judgment exposes a contradiction in heroic credit: cooperation is necessary, yet the institution evaluating excellence demands isolated achievement.
Heracles dips arrows in Hydra blood or bile. Those weapons kill Nessus and contribute indirectly to Heracles' own death through the poisoned garment; one also wounds the immortal Chiron in other traditions. Victory therefore converts the monster into portable technology whose consequences continue long after Lerna.
Genealogy
Genealogical records and atlas relationships
The atlas places the Hydra among heroic-age monsters and links it narratively to Heracles. Its parents and siblings lie outside the selected graph.
No line of this type is drawn in the current atlas.
No line of this type is drawn in the current atlas.
No line of this type is drawn in the current atlas.
No line of this type is drawn in the current atlas.
Typhon and Echidna are the Hydra's parents in Hesiod. Cerberus, Orthrus, and Chimera belong to the same broad family, though ancient genealogical details and intermediate parentage can vary.
Open the interactive branch ↗Art & objects
Museum objects · painting · sculpture
The selection is restricted to objects with a defensible identification and an institutional catalogue record. Where reproduction is unavailable, the page supplies a bibliographic plate rather than an unrelated image.
Painting · Art Institute of Chicago
Moreau freezes hero and monster in a vertical stare rather than showing rapid combat. The Hydra towers like a dark organic architecture while dead bodies make the cost of failed approaches visible.
Ancient object · The British Museum research trail
Ancient images often give Iolaus equal compositional necessity and may include the crab. The visual record therefore preserves cooperation more clearly than modern solo-hero icons.
Sculpture · The Metropolitan Museum of Art research trail
Labor cycles compress the Hydra into one panel among many, using club, branching necks, and youthful assistant as identifying signs. The sequence turns repeated danger into a monument of total heroic life.
Art thumbnails use public-domain, CC0, or attributed images. Every card identifies the object record, image source, and license; an editorial crop never replaces the institutional catalogue entry.
Reception across media
Text · stage · screen · scholarship
Each selected work treats this figure as its subject, title presence, principal voice, or central dramatic agent. Incidental appearances are excluded. The bibliography also avoids assigning the same representative title to multiple profiles except where a shared primary text is indispensable.
Selected bibliography
Gustave Moreau
The museum record identifies a confrontation in which the Hydra occupies a monumental share of the composition. Its many heads frame a central face that meets the hero's gaze.
Art Institute of ChicagoOpen record ↗Selected bibliography
Pseudo-Apollodorus
The account preserves regrowth, Iolaus, cauterization, the immortal head, the crab, and Eurystheus's refusal. It is the essential compact source for the monster's mechanics and collaborative defeat.
Perseus Digital LibraryOpen record ↗Selected bibliography
Developmental biology research tradition
The freshwater animal Hydra became a major model for regeneration, stem cells, and aging. The scientific name draws a precise analogy to regrowing heads while the organism and myth remain categorically different.
National Center for Biotechnology InformationOpen record ↗Institutional and scholarly resources
When modern book covers or publicity images are shown, they appear at small scale for identification and criticism; copyright remains with the named rights holders. Public-domain context images are explicitly labeled.
Sources & method
Sources and documentation
Dates follow conventional scholarly ranges. Cover thumbnails identify modern editions; they do not represent the original material form of an ancient text. Links lead to university archives, publishers, and museum catalogues.
Hesiodic tradition · late 8th–7th c. BCE
Hydra's parentage in the Typhon–Echidna monster family.Pseudo-Apollodorus · 1st–2nd c. CE
The full compact second-labor account and later use of venom.Sophocles · 5th c. BCE
The poisonous chain from Hydra through Nessus to Heracles' death.Art Institute of Chicago · 1875–76
Authoritative object, provenance, and Symbolist interpretation.The British Museum · Collection research
Museum biography and object corpus for ancient and later Hydra imagery.Family questions
The Lernaean Hydra is a child of Typhon and Echidna in Hesiod's genealogy.
He cut the heads while Iolaus cauterized the necks to stop regrowth, then buried the immortal head beneath a rock.
Heracles poisoned his arrows with its venom, which caused later deaths and ultimately contributed to his own mortal end.