Ichthyological Society of Hong Kong (香港魚類學會)

14/02/2026

24/01/2026

源自東京海洋大學而在2023年創業的一家新創企業，正著手養殖活用了最新生殖工學技術的新雜交魚。他們在千葉縣的房總半島將美味無比但養殖困難的夢幻魚”高體若鰺”、與養殖技術成熟的近親竹筴魚加以雜交，飼育出既美.....

18/01/2026

Researchers look to answer the question - where do archerfishes (𝑇𝑜𝑥𝑜𝑡𝑒𝑠 𝑐ℎ𝑎𝑡𝑎𝑟𝑒𝑢𝑠) spawn and grow? A fascinating study delving into the reproductive biology of this unique species of euryhaline fish, which has considerable scientific interest due to its unique feeding behavior, involving water spitting. The present study provides valuable insights into the habitat utilization of 𝑇. 𝑐ℎ𝑎𝑡𝑎𝑟𝑒𝑢𝑠 and contributes to the conservation of the species.

𝗥𝗲𝘀𝗲𝗮𝗿𝗰𝗵 𝗧𝗶𝘁𝗹𝗲
Where do archerfishes spawn and grow? Reproductive biology and early life history of 𝑇𝑜𝑥𝑜𝑡𝑒𝑠 𝑐ℎ𝑎𝑡𝑎𝑟𝑒𝑢𝑠 (Hamilton, 1822) in captivity

Paywall - https://link.springer.com/article/10.1007/s10641-025-01790-9

PDF available on ResearchGate - https://www.researchgate.net/publication/398552270_Where_do_archerfishes_spawn_and_grow_Reproductive_biology_and_early_life_history_of_Toxotes_chatareus_Hamilton_1822_in_captivity

𝗖𝗶𝘁𝗮𝘁𝗶𝗼𝗻
Momota, K., Doi, H., Kinosh*ta, I. et al. Where do archerfishes spawn and grow? Reproductive biology and early life history of 𝑇𝑜𝑥𝑜𝑡𝑒𝑠 𝑐ℎ𝑎𝑡𝑎𝑟𝑒𝑢𝑠 (Hamilton, 1822) in captivity. Environ Biol Fish 109, 23 (2026). https://doi.org/10.1007/s10641-025-01790-9

𝗔𝗯𝘀𝘁𝗿𝗮𝗰𝘁
The spotted archerfish 𝑇𝑜𝑥𝑜𝑡𝑒𝑠 𝑐ℎ𝑎𝑡𝑎𝑟𝑒𝑢𝑠, a euryhaline perciform species, is of considerable scientific interest due to its unique feeding behavior, involving water spitting. As little was previously known about the species’ life cycle, including reproductive behavior and early life history, the present study, which included breeding observations of adult 𝑇. 𝑐ℎ𝑎𝑡𝑎𝑟𝑒𝑢𝑠 and rearing experiments on eggs and hatchlings, revealed the onset of spawning behavior, morphological and behavioral development of larvae and juveniles, and spawning and nursery area conditions.

Prior to spawning, a school of males typically chased a single female, resulting in a single spawning event of at least 2,909 planktonic eggs (0.75 ± 0.01 mm). The eggs hatched 12–24 h after spawning, the hatched larvae, [2.84 ± 0.06 mm TL (total length)] being initially fed 𝐵𝑟𝑎𝑐ℎ𝑖𝑜𝑛𝑢𝑠 𝑠𝑝𝑝. The hatchlings were successfully raised in brackish water (16 ppt), suggesting that 𝑇. 𝑐ℎ𝑎𝑡𝑎𝑟𝑒𝑢𝑠 spawns and undergoes its larval period in estuarine environments. Notochord flexion was completed by 24 days after hatching (DAH) larvae, and the juvenile stage (7.61 ± 0.05 mm TL) was reached by 28 DAH. Water spitting behavior was first observed in a 115 DAH juvenile. By 360 DAH, individuals (60.51 ± 1.76 mm TL) exhibited adult morphological characteristics.

The present study provided valuable insights into the habitat utilization of 𝑇. 𝑐ℎ𝑎𝑡𝑎𝑟𝑒𝑢𝑠 and contributes to the conservation of the species.

𝗣𝗵𝗼𝘁𝗼 𝗖𝗿𝗲𝗱𝗶𝘁
Top - Developmental series of 𝑇𝑜𝑥𝑜𝑡𝑒𝑠 𝑐ℎ𝑎𝑡𝑎𝑟𝑒𝑢𝑠: a 2.77 mm newly-hatched larva; b 3.16 mm preflexion larva 3 days after hatching (DAH); c 4.50 mm flexion larva 16 DAH; d 4.82 mm flexion larva 18 DAH; e 6.26 mm postflexion larva 24 DAH; f 7.56 mm juvenile 28 DAH; g 26.06 mm juvenile 120 DAH; h 62.12 mm young fish with adult characteristics 360 DAH. Scale bars 1.0 mm in Figs a–f, 10.0 mm in Figs g–h
Bottom left - Spotted archerfish (𝑇𝑜𝑥𝑜𝑡𝑒𝑠 𝑐ℎ𝑎𝑡𝑎𝑟𝑒𝑢𝑠). Photo by Ria Tan , https://www.flickr.com/photos/wildsingapore/5510611757/in/photostream/
https://creativecommons.org/licenses/by-nc-sa/2.0/deed.en
Bottom right - Initial spawning behaviour of 𝑇𝑜𝑥𝑜𝑡𝑒𝑠 𝑐ℎ𝑎𝑡𝑎𝑟𝑒𝑢𝑠, observed the night prior to fertilized egg collection. a school of males tracking a female.

Copyright © 2025 the Author(s). Published in the Environmental Biology of Fishes journal.

30/12/2025

𝑂𝑟𝑦𝑧𝑖𝑎𝑠 𝑐𝑎𝑏𝑎𝑟𝑎𝑛𝑒𝑛𝑠𝑖𝑠, a new species of ricefish, is described from Yilan County, northern Taiwan. The authors also provide a comparison with related species in this paper.

𝗥𝗲𝘀𝗲𝗮𝗿𝗰𝗵 𝗧𝗶𝘁𝗹𝗲
A new freshwater ricefish of genus 𝑂𝑟𝑦𝑧𝑖𝑎𝑠 (Teleostei: Adrianichthyidae) from northern Taiwan

Open-access - https://www.mapress.com/zt/article/view/zootaxa.5738.1.23

𝗖𝗶𝘁𝗮𝘁𝗶𝗼𝗻
Chen, I.-S., Yeh, M.-F. & Lai, H.-T. (2025) A new freshwater ricefish of genus 𝑂𝑟𝑦𝑧𝑖𝑎𝑠 (Teleostei: Adrianichthyidae) from northern Taiwan. Zootaxa, 5738 (1), 190–196. https://doi.org/10.11646/zootaxa.5738.1.23

𝗔𝗯𝘀𝘁𝗿𝗮𝗰𝘁
A new freshwater ricefish was collected recently from northern Taiwan, which has been identified as a species new to science. The new species, 𝑂𝑟𝑦𝑧𝑖𝑎𝑠 𝑐𝑎𝑏𝑎𝑟𝑎𝑛𝑒𝑛𝑠𝑖𝑠 sp. nov., can be well distinguished from other congeners by the following unique combination of features: (1) fin-ray counts: dorsal-fin rays 6; a**l-fin rays modally 17; pectoral-fin rays 9–10; (2) body compressed laterally, body depth at pelvic origin 20.9–23.3 (22.3), body depth at a**l fin origin 17.2–20.1 (18.8); (3) the dorsal-fin origin inserted almost at the vertical of 12th a**l-fin rays; and (4) specific coloration: Body translucent, light creamy yellowish, a dotted, longitudinal black line. Belly wall, peritoneum slivery, somewhat subrectangular. Operculum and pre-pectoral region slivery. Eye light bluish. Caudal fin unmarked. Pelvic and a**l fins with tiny melanophores. The diagnostic characters and a comparison with related species will also be provided.

𝗘𝘁𝘆𝗺𝗼𝗹𝗼𝗴𝘆
The specific name, 𝑐𝑎𝑏𝑎𝑟𝑎𝑛𝑒𝑛𝑠𝑖𝑠, is referred to the names of the fish holotype locality collected from the “Cabaran” (the classical name for Yilan County), Taiwan.

𝗣𝗵𝗼𝘁𝗼 𝗖𝗿𝗲𝗱𝗶𝘁
𝑂𝑟𝑦𝑧𝑖𝑎𝑠 𝑐𝑎𝑏𝑎𝑟𝑎𝑛𝑒𝑛𝑠𝑖𝑠 sp. nov., A. male, NTOUP-2024-09-231; 23.6 mm SL, b. female, 26.5 mm SL, coll. H.T. Lai; Spetember 16, 2024; Shuanlianpi, Yilan County, Taiwan.

Copyright © 2025 the Author(s). Published in the Zootaxa journal. This paper is released under a Creative Commons Attribution 4.0 International (CC-BY-4.0) licence. https://creativecommons.org/licenses/by/4.0/

10/12/2025

09/12/2025

𝑀𝑎𝑠𝑡𝑎𝑐𝑒𝑚𝑏𝑒𝑙𝑢𝑠 𝑑𝑖𝑐𝑡𝑦𝑜𝑛 (a), a new species of spiny eel, of the 𝑀. 𝑎𝑟𝑚𝑎𝑡𝑢𝑠 species group is described from the Mekong drainage in Laos. The authors discuss at length the taxonomy of 𝑀. 𝑎𝑟𝑚𝑎𝑡𝑢𝑠 species group, and confirm the current, valid species of 𝑀𝑎𝑠𝑡𝑎𝑐𝑒𝑚𝑏𝑒𝑙𝑢𝑠 in Laos.

“Hereunder, 𝑀. 𝑎𝑟𝑚𝑎𝑡𝑢𝑠 refers only to the species known from India and Myanmar to which belongs the neotype designated below. This identity excludes all the records from Thailand, Cambodia, Laos, Vietnam, and China that have previously been referred to by this name.”

𝗥𝗲𝘀𝗲𝗮𝗿𝗰𝗵 𝗧𝗶𝘁𝗹𝗲
Spiny eels of the genus 𝑀𝑎𝑠𝑡𝑎𝑐𝑒𝑚𝑏𝑒𝑙𝑢𝑠 in the Mekong drainage in Laos, with description of 𝑀. 𝑑𝑖𝑐𝑡𝑦𝑜𝑛 (Teleostei: Synbranchiformes)

Open-access (direct PDF) -https://lkcnhm.nus.edu.sg/wp-content/uploads/sites/11/2025/12/RBZ-2025-0042.pdf

𝗖𝗶𝘁𝗮𝘁𝗶𝗼𝗻
Britz, R. & Kottelat, M., 2025, Spiny eels of the genus 𝑀𝑎𝑠𝑡𝑎𝑐𝑒𝑚𝑏𝑒𝑙𝑢𝑠 in the Mekong drainage in Laos, with description of 𝑀. 𝑑𝑖𝑐𝑡𝑦𝑜𝑛 (Teleostei: Synbranchiformes), Raffles Bulletin of Zoology, 73: 652–678. DOI: https://doi.org/10.26107/RBZ-2025-0042

𝗔𝗯𝘀𝘁𝗿𝗮𝗰𝘁
𝑀𝑎𝑠𝑡𝑎𝑐𝑒𝑚𝑏𝑒𝑙𝑢𝑠 𝑑𝑖𝑐𝑡𝑦𝑜𝑛, new species, a spiny eel of the 𝑀. 𝑎𝑟𝑚𝑎𝑡𝑢𝑠 species group, is described from the Mekong drainage in Laos.

It is distinguished from 𝑀. 𝑎𝑟𝑚𝑎𝑡𝑢𝑠 by having fewer caudal-fin rays (13–15 vs 18–20), fewer abdominal (35–39 vs 42–43), caudal (47–51 vs 51–55), and total vertebrae (85–90 vs 94–97), and by fewer dorsal-fin spines (33–37 vs 37–38); and from 𝑀. 𝑓𝑎𝑣𝑢𝑠 by differences in colour pattern. Earlier records of 𝑀. 𝑓𝑎𝑣𝑢𝑠 from Laos are not confirmed, but its presence there is possible; a lectotype is designated for 𝑀. 𝑓𝑎𝑣𝑢𝑠. A neotype is designated for 𝑀. 𝑎𝑟𝑚𝑎𝑡𝑢𝑠; its type locality is in the Ganges drainage, India. Previous neotype designations for 𝑀. 𝑢𝑛𝑑𝑢𝑙𝑎𝑡𝑢𝑠 and 𝑀. 𝑡ℎ𝑎𝑐𝑏𝑎𝑒𝑛𝑠𝑖𝑠 are invalid. A neotype is designated for 𝑀. 𝑢𝑛𝑑𝑢𝑙𝑎𝑡𝑢𝑠, making it an objective junior synonym of 𝑀. 𝑎𝑟𝑚𝑎𝑡𝑢𝑠. The presence in Laos of 𝑀. 𝑑𝑖𝑒𝑛𝑏𝑖𝑒𝑛𝑒𝑛𝑠𝑖𝑠, 𝑀. 𝑡ℎ𝑎𝑐𝑏𝑎𝑒𝑛𝑠𝑖𝑠, and 𝑀. 𝑡𝑖𝑛𝑤𝑖𝑛𝑖 is confirmed.

𝗘𝘁𝘆𝗺𝗼𝗹𝗼𝗴𝘆
The name is derived from the Greek word δίκτυον (𝑑𝑖𝑐𝑡𝑦𝑜𝑛), net, referring to the network of dark interconnected lines on the body. A noun in apposition.

𝗣𝗵𝗼𝘁𝗼 𝗖𝗿𝗲𝗱𝗶𝘁
a, 𝑀𝑎𝑠𝑡𝑎𝑐𝑒𝑚𝑏𝑒𝑙𝑢𝑠 𝑑𝑖𝑐𝑡𝑦𝑜𝑛, CMK 12786, 146 mm; Laos: Mekong drainage: Nam Kading watershed: Nam Theun; actual specimen and schematic drawing with coloured coded dark markings. b, 𝑀. 𝑓𝑎𝑣𝑢𝑠, CMK 20188, 126 mm; Thailand: Chantaburi Province: Mekong drainage: Tonle Sap watershed; actual specimen and schematic drawing with colour coded dark markings. Stripe a not shown. Note presence of stripe b (red) in 𝑀. 𝑑𝑖𝑐𝑡𝑦𝑜𝑛 and its reduction to blotches in 𝑀. 𝑓𝑎𝑣𝑢𝑠. For explanation of colour coding, see Fig. 1.

Copyright © 2025 the Author(s). Published in the Raffles Bulletin of Zoology.

06/12/2025

14/11/2025

𝐷𝑒𝑣𝑎𝑟𝑖𝑜 𝑎𝑙𝑡𝑢𝑠, a new species of giant danio, is described from the central highlands of Sri Lanka. The authors discuss in detail the phylogeny and biogeography of the now five 𝐷𝑒𝑣𝑎𝑟𝑖𝑜 species from Sri Lanka, 𝐷𝑒𝑣𝑎𝑟𝑖𝑜 𝑚𝑒𝑚𝑜𝑟𝑖𝑎𝑙𝑖𝑠, 𝐷. 𝑚𝑖𝑐𝑟𝑜𝑛𝑒𝑚𝑎, 𝐷. 𝑝𝑎𝑡ℎ𝑖𝑟𝑎𝑛𝑎, 𝐷. 𝑚𝑎𝑙𝑎𝑏𝑎𝑟𝑖𝑐𝑢𝑠 and 𝐷. 𝑎𝑙𝑡𝑢𝑠 sp. nov.

"Through a morphological a**lysis of 363 voucher specimens representative of all five species, we characterize the species, thereby stabilizing their taxonomy."

𝗥𝗲𝘀𝗲𝗮𝗿𝗰𝗵 𝗧𝗶𝘁𝗹𝗲
Species without borders: the diversification of giant danios in Sri Lanka (Teleostei, Danionidae, 𝐷𝑒𝑣𝑎𝑟𝑖𝑜)

Open-access - https://evolsyst.pensoft.net/article/162251/

𝗖𝗶𝘁𝗮𝘁𝗶𝗼𝗻
Sudasinghe H, Pethiyagoda R, Meegaskumbura M (2025) Species without borders: the diversification of giant danios in Sri Lanka (Teleostei, Danionidae, 𝐷𝑒𝑣𝑎𝑟𝑖𝑜). Evolutionary Systematics 9(2): 229-258. https://doi.org/10.3897/evolsyst.9.162251

𝗔𝗯𝘀𝘁𝗿𝗮𝗰𝘁
The five species of 𝐷𝑒𝑣𝑎𝑟𝑖𝑜 in Sri Lanka form a monophyletic insular diversification. 𝐷𝑒𝑣𝑎𝑟𝑖𝑜 𝑚𝑒𝑚𝑜𝑟𝑖𝑎𝑙𝑖𝑠, 𝐷. 𝑚𝑖𝑐𝑟𝑜𝑛𝑒𝑚𝑎 and 𝐷. 𝑝𝑎𝑡ℎ𝑖𝑟𝑎𝑛𝑎 are specialists that inhabit rainforest foothill streams, while 𝐷. 𝑎𝑙𝑡𝑢𝑠 sp. nov., is confined to a single montane site (1580 m asl). Finally, 𝐷. 𝑚𝑎𝑙𝑎𝑏𝑎𝑟𝑖𝑐𝑢𝑠, a generalist species associated with open lentic and lotic habitats, is widely distributed from ~0–1500 m asl. The taxonomy of these species has been handicapped by a high degree of intraspecific phenetic variation.

Here we construct a phylogeny of, and haplotype networks for, Sri Lankan 𝐷𝑒𝑣𝑎𝑟𝑖𝑜 using a molecular dataset derived from the 𝑐𝑜𝑥1 and 𝑐𝑦𝑡𝑏 mitochondrial DNA markers and the 𝑟𝑎𝑔1 and 𝑖𝑟𝑑𝑝 nuclear DNA markers representative of all five species.

We compare the mitochondrial and nuclear phylogenies for evidence of discordance, showing that 𝐷. 𝑚𝑎𝑙𝑎𝑏𝑎𝑟𝑖𝑐𝑢𝑠 appears to have hybridized with all the other species, except 𝐷. 𝑚𝑒𝑚𝑜𝑟𝑖𝑎𝑙𝑖𝑠, in their contact zones. The phenotype of 𝐷. 𝑚𝑎𝑙𝑎𝑏𝑎𝑟𝑖𝑐𝑢𝑠 varies with elevation as a cline, partly converging on the phenotype of 𝐷. 𝑎𝑙𝑡𝑢𝑠 sp. nov., possibly through introgression with 𝐷. 𝑎𝑙𝑡𝑢𝑠 sp. nov. or adaptation to hill-stream habitats.

Through a morphological a**lysis of 363 voucher specimens representative of all five species, we characterize the species, thereby stabilizing their taxonomy.

𝗘𝘁𝘆𝗺𝗼𝗹𝗼𝗴𝘆
The species-name 𝑎𝑙𝑡𝑢𝑠 is Latin for ‘high’, an allusion to this species being restricted to the Sri Lankan highlands. Applied as a noun in apposition. Suggested vernacular name in English: Sri Lanka Montane Danio.

𝗣𝗵𝗼𝘁𝗼 𝗖𝗿𝗲𝗱𝗶𝘁
Top - Colouration of 𝐷𝑒𝑣𝑎𝑟𝑖𝑜 𝑎𝑙𝑡𝑢𝑠 sp. nov., in aquarium (~50 mm SL).
Bottom - A . Sampling localities for Sri Lankan 𝐷𝑒𝑣𝑎𝑟𝑖𝑜 for the molecular a**lysis in the present study. Numbers on the map represent the sampling localities in Table 1. Major river-basin boundaries are marked with narrow black lines. Live coloration of B . 𝐷. 𝑚𝑒𝑚𝑜𝑟𝑖𝑎𝑙𝑖𝑠; C . 𝐷. 𝑝𝑎𝑡ℎ𝑖𝑟𝑎𝑛𝑎; D . 𝐷. 𝑚𝑖𝑐𝑟𝑜𝑛𝑒𝑚𝑎; E . 𝐷. 𝑎𝑙𝑡𝑢𝑠, sp. nov.; F . 𝐷. 𝑚𝑎𝑙𝑎𝑏𝑎𝑟𝑖𝑐𝑢𝑠. Specimen coloration of populations of 𝐷𝑒𝑣𝑎𝑟𝑖𝑜 identified as G . 𝐷. 𝑐𝑓. 𝑚𝑎𝑙𝑎𝑏𝑎𝑟𝑖𝑐𝑢𝑠 (highland phenotype); H . 𝐷.𝑚𝑎𝑙𝑎𝑏𝑎𝑟𝑖𝑐𝑢𝑠 x 𝐷. 𝑝𝑎𝑡ℎ𝑖𝑟𝑎𝑛𝑎 hybrids; I. 𝐷. 𝑚𝑎𝑙𝑎𝑏𝑎𝑟𝑖𝑐𝑢𝑠 x 𝐷. 𝑚𝑖𝑐𝑟𝑜𝑛𝑒𝑚𝑎 hybrids.

Copyright © 2025 the Author(s). Published in the Evolutionary Systematics journal. This paper is released under a Creative Commons Attribution 4.0 International (CC-BY-4.0) licence. https://creativecommons.org/licenses/by/4.0/

25/10/2025

12/10/2025

圖一：本研究的圖解摘要（圖片來源：Herbert AL et al. (2024)，採用 CC BY 4.0 授權，https://creativecommons.org/licenses/by/4.0）

12/10/2025

Sharks of the World poster by Roger Hall
https://www.ceressoft.net

11/10/2025

Shark Alphabet_ Poster for Sale by babybigfoot