Definition
A Latin term from the old English legal lexicon denoting a fishery — that is, a right or place of fishing. Piscaria refers to the legal interest in taking fish from a body of water, whether as a proprietary right over the water itself or as a profit à prendre exercised over another's water. The term appears in medieval writs and pleadings as the formal Latin designation for what English-language sources more commonly rendered as "piscary" or "fishery."
Common Confusion
Piscaria, piscary, and fishery are not always used with precision in historical sources. Piscaria is the strict Latin form found in writs and register entries. Piscary (or common of piscary) typically refers to the right held in common with others to fish in a particular water — a species of common right rather than an exclusive fishery. Fishery is the broadest English term and encompasses several legally distinct interests: free fishery (an exclusive royal or franchise right), several fishery (a private proprietary right), common of piscary (a shared right appurtenant to land), and a fishery in gross (a right held independently of land ownership). Researchers encountering piscaria in a writ or plea roll should not assume it specifies which type of fishery is at issue without examining the full context of the instrument.
Why It Matters in Research
Piscaria is a term of the writs. Researchers working in plea rolls, registers of original writs, or early common law pleading records will encounter it as a routine Latin placeholder for fishery claims rather than as a term of art with its own independent legal content. Its significance lies almost entirely in directing the researcher toward the substantive law of fisheries and water rights, which was elaborated under the English labels rather than the Latin one.
The Registrum Omnium Brevium — the register of original writs — is the primary locus for the term in English legal history. Burrill cites Reg. Orig. 156 directly. Researchers consulting the Registrum will find piscaria embedded in writ forms for asserting fishery rights, and reading those forms alongside Bracton and later common law treatments of water rights will supply the substantive doctrine that the bare Latin term does not itself carry.
One navigational trap: because piscaria simply translates to piscary in most contexts, researchers may find older digests and abridgments indexing the subject matter under piscary, fishery, or several fishery without cross-referencing the Latin form at all. Searching only for the Latin will miss the bulk of the doctrinal development. Conversely, researchers indexing historical source texts by subject should flag piscaria as a fishery-rights entry even when it appears without doctrinal elaboration.
Jurisdictional variation also matters here. The elaborated common law of fishery rights — distinguishing free fishery, several fishery, and common of piscary — is distinctly English in origin. Civilian and continental legal traditions used related Latin vocabulary (piscatio, ius piscandi) but developed fishery rights along different conceptual lines. Researchers working in Scottish, Canadian, or early American sources should not assume that piscaria carried identical doctrinal freight when it appeared in those contexts.
Historical Dictionary Support
Burrill's Law Dictionary provides the entry in full: "L. Lat. [from piscis, fish.] In old English law. Fishery; a fishery. Reg. Orig. 156. Sometimes translated piscary, (q. v.)" This is an accurate and complete characterization of the term's function. The entry is brief because the term is a transliteration vehicle rather than an independent doctrinal concept — Burrill sensibly directs the reader to piscary for substantive content.
Historical dictionaries beyond Burrill add little to piscaria specifically, though Jacob's Law Dictionary, Tomlin's Law Dictionary, and Bouvier's Law Dictionary all treat piscary and fishery at greater length under those English headings. The gap in the historical dictionary record is not an oversight — it reflects the reality that piscaria was used in practice as a formal writ-drafting term, and the doctrine lived under the English vocabulary.
Jurisdictional Note
Piscaria as a writ term is specific to the English common law tradition and its direct inheritors. In American legal practice, fishery rights were generally addressed through property law and later through regulatory frameworks without resort to the Latin form. Researchers in American historical sources from the colonial and early national periods may encounter the term in documents modeled on English precedents, but it was not adopted into American legal terminology as a term of art.