Onna's
Seagrass Bed
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恩納的海草床
Seagrass bed in Onna-son
Seagrass beds are quite common around Okinawa, especially in the shallow lagoons near the coast. Just downhill from my institute, OIST, there’s Tancha Beach, where a beautiful, healthy seagrass bed stretches out beneath the waves. It’s full of life, with all kinds of fishes swimming around. On this page, I’ll be sharing some of the amazing fish diversity found there!
Seagrass beds
Seagrass beds, or meadows, are unique marine ecosystems mostly dominated by saltwater flowering plants. These habitats support an incredible diversity of marine life, serving as important shelters and nursery grounds for many species, especially fishes. You won’t often find large fishes here—mostly juveniles. Seagrass beds also play vital ecological roles, including photosynthesis and carbon sequestration, helping to store carbon and maintain ocean health.
Fish Diversity in Tancha Beach [谷茶ビーチ]
Mugilidae 鯔科、ボラ科
Mugilidae 鯔科、ボラ科
Order Mugiliformes
Species
Mugil cephalus cephalus 鯔魚、ボラ
20250923 Mugil cephalus
20250923 Mugil cephalus
Syngnathidae 海龍科、ヨウジウオ科
Syngnathidae 海龍科、ヨウジウオ科
Order: Syngnathiformes
Species
Corythoichthys haematopterus イシヨウジ 紅鰭冠海龍
20250923 Corythoichthys haematopterus
20251108 Corythoichthys haematopterus
Synodontidae 合齒魚科、エソ科
Synodontidae 合齒魚科、エソ科
Order: Aulopiformes
Species
Saurida gracilis [細蛇鯔、マダラエソ]
20251019 Saurida gracilis
Apogonidae 天竺鯛科、テンジクダイ科
Apogonidae 天竺鯛科、テンジクダイ科
(Order: Gobiiformes)
Species
Ostorhinchus ishigakiensis [石垣鸚天竺鯛、ミヤコイシモチ]
Ostorhinchus wassinki [沃氏鸚天竺鯛、キンセンイシモチ]
Ostorhinchus taeniophorus [褐帶鸚天竺鯛、ミスジテンジクダイ]
20250906 Ostorhinchus ishigakiensis
20251019 Ostorhinchus wassinki
202007 Ostorhinchus taeniophorus [Kenting, Taiwan]
Gobiidae 鰕虎科、ハゼ科
Gobiidae 鰕虎科、ハゼ科
(Order: Gobiiformes)
Species
Amblygobius phalaena [尾斑鈍鰕虎、サラサハゼ]
Asterropteryx semipunctata [星塘鱧、ホシハゼ]
Gunnellichthys pleurotaenia [縱帶鳚鰕虎、オオメワラスボ]
Gnatholepis anjerensis [頜鱗鰕虎、オオモンハゼ]
Istigobius decoratus [華麗銜鰕虎、ホシカザリハゼ]
Vanderhorstia sp. [未命名梵鰕虎、ヤツシハゼ sp.]
Valenciennea longipinnis [長鰭范氏塘鱧、サザナミハゼ]
Valenciennea strigata [紅帶范氏塘鱧、アカハチハゼ]
20200813 Amblygobius phalaena [Kenting, TW]
20251019 Asterropteryx semipunctata
20250913 Gunnellichthys pleurotaenia
20251005 Gnatholepis anjerensis
20251109 Istigobius decoratus
20251019 Vanderhorstia sp.
20250913 Valenciennea longipinnis
20251012 Valenciennea strigata
Blenniidae 䲁科、イソギンポ科
Blenniidae 䲁科、イソギンポ科
Order: Blenniiformes
Species
Aspidontus taeniatus [三帶盾齒䲁、ニセクロスジギンポ]
Petroscirtes mitratus [高鰭跳岩䲁、ハタタテギンポ]
20251019 Aspidontus taeniatus
20251005 Petroscirtes mitratus
Tripterygiidae 三鰭䲁科、ヘビギンポ科
Tripterygiidae 三鰭䲁科、ヘビギンポ科
Order: Blenniiformes
Species
Ucla xenogrammus [突頜三鰭䲁、カスリヘビギンポ]
20251019 Ucla xenogrammus
Pomacentridae 雀鯛科、スズメダイ科
Pomacentridae 雀鯛科、スズメダイ科
Order: Blenniiformes
Species
Abudefduf sexfasciatus [六線豆娘魚]
Amphiprion clarkii [克氏海葵魚、クマノミ]
Dascyllus aruanus [三帶圓雀鯛]
Dascyllus trimaculatus [三斑圓雀鯛]
Editing
20251019 Abudefduf sexfasciatus and others
20251005 Amphiprion clarkii
20251109 Dascyllus trimaculatus
20250920 Dascyllus trimaculatus
Scombridae 鯖科、サバ科
Scombridae 鯖科、サバ科
Order: Scombriformes
Species
Rastrelliger kanagurta [金帶花鯖、グルクマ]
20250913 Rastrelliger kanagurta [blurry!]
0251019 Rastrelliger kanagurta [Cape Maeda]
Carangidae 鰺科、アジ科
Carangidae 鰺科、アジ科
Order: Carangiformes
Species
Alectis ciliaris [絲鰺、イトヒキアジ]
Caranx papuensis [巴布亞鰺、オニヒラアジ]
Gnathanodon speciosus [無齒鰺、コガネシマアジ]
20251012 Caranx papuensis
20251005 Gnathanodon speciosus
Epinephelidae 石斑魚科、ハタ科
Epinephelidae 石斑魚科、ハタ科
Order: Perciformes
Species
Epinephelus macrospilos キビレハタ
Epinephelus maculatus シロブチハタ
Epinephelus merra カンモンハタ
Epinephelus macrospilos [Lanyu, Taiwan]
20250928 Epinephelus merra [Cape Maeda]
Scorpaenidae 鮋科、フサカサゴ科
Scorpaenidae 鮋科、フサカサゴ科
Order: Perciformes
Species
Pterois volitans 魔鬼蓑鮋
Dendrochirus brachypterus 短鰭多臂蓑鮋
Dendrochirus zebra 花斑短鰭蓑鮋
20251005 Dendrochirus brachypterus
20251005 Dendrochirus zebra
20251012 Pterois volitans
20250906 Pterois volitans
Sparidae 鯛科、タイ科
Sparidae 鯛科、タイ科
Order: Acanthuriformes
Species
Acanthopagrus sivicolus [橘鰭棘鯛、ミナミクロダイ]
Notes: It occurs in sandy area between beach and seagrass bed.
20250923 Acanthopagrus sivicolus
20250923 Acanthopagrus sivicolus
Ephippidae 燕魚科、マンジュウダイ科
Ephippidae 燕魚科、マンジュウダイ科
Order: Acanthuriformes
Species
Platax orbicularis [圓眼燕魚、ナンヨウツバメウオ]
20251019 Platax orbicularis
Pomacanthidae 蓋刺魚科、キンチャクダイ科
Pomacanthidae 蓋刺魚科、キンチャクダイ科
Order: Acanthuriformes
Species
Pomacanthus semicirculatus [サザナミヤッコ、半環刺蓋魚、]
20251019 P. semicirculatus juvenile
Lutjanidae 笛鯛科、フエダイ科
Lutjanidae 笛鯛科、フエダイ科
Order: Acanthuriformes
Species
Lutjanus fulviflamma [火斑笛鯛、ニセクロホシフエダイ]
Lutjanus fulvus [黃足笛鯛、オキフエダイ]
Lutjanus gibbus [隆背笛鯛、ヒメフエダイ]
20250913 Lutjanus fulviflamma
20220722 Lutjanus gibbus [Lanyu, Taiwan]
Haemulidae 石鱸科、イサキ科
Haemulidae 石鱸科、イサキ科
Order: Acanthuriformes
Species
Diagramma pictum pictum [密點少棘胡椒鯛、コロダイ]
Plectorhinchus lessonii [雷氏胡椒鯛、ヒレグロコショウダイ]
20251005 Diagramma pictum pictum
20251005 Plectorhinchus lessonii
Balistidae 鱗魨科、モンガラカワハギ科
Balistidae 鱗魨科、モンガラカワハギ科
Order: Tetraodontiformes
Species
Balistoides viridescens [褐擬鱗魨、ゴマモンガラ]
Rhinecanthus aculeatus [ 尖吻棘魨、ムラサメモンガラ]
Rhinecanthus verrucosus [毒吻棘魨、クラカケモンガラ]
20251005 Rhinecanthus aculeatus
20251019 Rhinecanthus verrucosus
20250913 Balistoides viridescens
Monacanthidae 單棘魨科、カワハギ科
Monacanthidae 單棘魨科、カワハギ科
Order: Tetraodontiformes
Species
Cantherhines pardalis [細斑刺鼻單棘魨、アミメウマヅラハギ]
Oxymonacanthus longirostris [尖吻單棘魨、テングカワハギ]
20251005 Oxymonacanthus longirostris
photo bomb
Ostraciidae 箱魨科、ハコフグ科
Ostraciidae 箱魨科、ハコフグ科
Order: Tetraodontiformes
Species
Ostracion cubicus [粒突箱魨、ミナミハコフグ]
20251019 Ostracion cubicus
Tetraodontidae 四齒魨科、フグ科
Tetraodontidae 四齒魨科、フグ科
Order: Tetraodontiformes
Species
Arothron hispidus [紋腹叉鼻魨、サザナミフグ]
Arothron immaculatus [無斑叉鼻魨、カスミフグ]
Canthigaster valentini [瓦氏尖鼻魨、シマキンチャクフグ]
20250619 Arothron hispidus [night observation]
20251109 Arothron immaculatus
20251109 Canthigaster valentini
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