biostudies-literatureUnknown1220Su YThe large-mouth pricklefish, <i>Malacosarcusmacrostoma</i> (Günther, 1878), previously known from five specimens collected from the central Pacific Ocean, is redescribed based on three specimens collected from the abyssal zone (4,412-4,813 m) off the southeastern coast of Taiwan. These specimens contribute to a more comprehensive description of <i>M.macrostoma</i> and represent this species' westernmost and deepest record. This study provides a detailed description, fresh photographs, and notes on their morphological characteristics of the specimens. Lastly, the distributional records of <i>M.macrostoma</i> are discussed.ZooKeys93-104https://www.ebi.ac.uk/biostudies/studies/S-EPMC11650148biostudies-literatureRedescription of &lt;i&gt;Malacosarcusmacrostoma&lt;/i&gt; (Gunther, 1878) from the abyssal zone off Taiwan, northwestern Pacific Ocean (Beryciformes, Stephanoberycoidei, Stephanoberycidae).PMC11650148Su YHo HCLee MYfalseRedescription of &lt;i&gt;Malacosarcusmacrostoma&lt;/i&gt; (Gunther, 1878) from the abyssal zone off Taiwan, northwestern Pacific Ocean (Beryciformes, Stephanoberycoidei, Stephanoberycidae).The large-mouth pricklefish, <i>Malacosarcusmacrostoma</i> (Günther, 1878), previously known from five specimens collected from the central Pacific Ocean, is redescribed based on three specimens collected from the abyssal zone (4,412-4,813 m) off the southeastern coast of Taiwan. These specimens contribute to a more comprehensive description of <i>M.macrostoma</i> and represent this species' westernmost and deepest record. This study provides a detailed description, fresh photographs, and notes on their morphological characteristics of the specimens. Lastly, the distributional records of <i>M.macrostoma</i> are discussed.2024-01-01T00:00:00Z20242025-04-26T17:01:46.589Z2025-04-06T15:25:15.441ZS-EPMC116501483969822710.3897/zookeys.1220.126580