Hallhaid (Carcharhinus), kalade perekond hallhailaste (Carcharhinidae) sugukonnast, 35 liiki.
Üsna laisad ja aeglaselt ujuvad kalad, kes on levinud kõikides ookeanides. Mõned liigid, nt tömpnina-hallhai, võivad rünnata ka inimest.
Carcharhinus acronotus Poey, 1860 (blacknose shark) – mustnina-hallhai
Carcharhinus albimarginatus Rüppell, 1837 (silvertip shark) – hõbeserv-hallhai
Carcharhinus altimus S. Springer, 1950 (bignose shark) – suurnina-hallhai
Carcharhinus amblyrhynchoides Whitley, 1934 (graceful shark) – sire hallhai
Carcharhinus amblyrhynchos Bleeker, 1856 (grey reef shark) – mustsaba-hallhai
Carcharhinus amboinensis J. P. Müller & Henle, 1839 (pigeye shark) – seasilm-hallhai
Carcharhinus borneensis Bleeker, 1858 (Borneo shark) – borneo hallhai
Carcharhinus brachyurus Günther, 1870 (copper shark) – pronksjas hallhai
Carcharhinus brevipinna J. P. Müller & Henle, 1839 (spinner shark) – värten-hallhai
Carcharhinus cautus Whitley, 1945 (nervous shark) – pelgur-hallhai
Carcharhinus cerdale C. H. Gilbert, 1898 (Pacific smalltail shark) – lühihänd-hallhai
Carcharhinus coatesi Whitley, 1939 (Coates's shark) – Coatesi hallhai
Carcharhinus dussumieri J. P. Müller & Henle, 1839 (whitecheek shark) –valgepõsk-hallhai
Carcharhinus falciformis J. P. Müller & Henle, 1839 (silky shark) – siid-hallhai
Carcharhinus fitzroyensis Whitley, 1943 (creek whaler) – abaja-hallhai
Carcharhinus galapagensis Snodgrass & Heller, 1905 (Galapagos shark) – galapagose hallhai
Carcharhinus hemiodon J. P. Müller & Henle, 1839 (Pondicherry shark) – kahelihambune hallhai
Carcharhinus humani W. T. White & Weigmann, 2014 (Human's whaler shark) – Humani hallhai
Carcharhinus isodon J. P. Müller & Henle, 1839 (finetooth shark) – võrdhambune hallhai
Carcharhinus leiodon Garrick, 1985 (smoothtooth blacktip shark) – silehambune hallhai
Carcharhinus leucas J. P. Müller & Henle, 1839 (bull shark) – tömpnina-hallhai
Carcharhinus limbatus J. P. Müller & Henle, 1839 (blacktip shark) – mustserv-hallhai
Carcharhinus longimanus Poey, 1861 (oceanic whitetip shark) – pikkuim-hallhai
Carcharhinus macloti J. P. Müller & Henle, 1839 (hardnose shark) – kalknina-hallhai
Carcharhinus macrops – suursilm-hallhai
Carcharhinus melanopterus Quoy & Gaimard, 1824 (blacktip reef shark) – mustuim-hallhai
Carcharhinus obscurus Lesueur, 1818 (dusky shark) – tõmmu hallhai
Carcharhinus perezii Poey, 1876 (Caribbean reef shark) – koralli-hallhai
Carcharhinus plumbeus Nardo, 1827 (sandbar shark) – leetseljaku-hallhai
Carcharhinus porosus Ranzani, 1839 (smalltail shark) – poorsilm-hallhai
Carcharhinus sealei Pietschmann, 1913 (blackspot shark) – mustlaik-hallhai
Carcharhinus signatus Poey, 1868 (night shark) – öö-hallhai
Carcharhinus sorrah J. P. Müller & Henle, 1839 (spot-tail shark) –laiksaba-hallhai
Carcharhinus tilstoni Whitley, 1950 (Australian blacktip shark) – Tilstoni hallhai
Carcharhinus tjutjot Bleeker, 1852 (Indonesian whaler shark) - valgepõsk-hallhai 2
Carcharhinus sp. A (false smalltail shark) – seni ametlikult kirjeldamata liik
Mai 2018