Blackspot Sergeant
探検魚類
Blackspot Sergeant
abudefduf sordidus
The Blackspot Sergeant (Abudefduf sordidus) is a resilient and territorial damselfish commonly encountered in the shallow surge zones and tide pools of the Indo-Pacific. Known for their spirited nature, these fish are an entertaining sight for snorkelers and beachgoers, often darting aggressively to defend their small patches of turf. While many reef fish retreat to deeper, calmer waters, the Blackspot Sergeant thrives in highly oxygenated, wave-swept environments where they graze on algae and small invertebrates. Their adaptability allows them to flourish even in marginally degraded or highly dynamic habitats, making them a familiar and lively staple of rocky shorelines. Observing their fast-paced, industrious behavior provides a wonderful window into the complex social dynamics of shallow-water reef ecosystems.
生息地: Found in the shallow waters of the Indo-Pacific, typically inhabiting wave-swept rocky shores, coral reef flats, and tidal pools.
外見
This sturdy damselfish features a light gray to silvery body adorned with five to six dark, vertical bands that fade slightly towards the belly. Its most defining characteristic, giving it its common name, is a prominent black saddle-like spot located on the upper edge of the caudal peduncle, just before the tail fin. Juveniles often display brighter overall coloration with a distinct black spot at the base of the dorsal fin. They possess a moderately deep, compressed body shape typical of the Abudefduf genus, allowing them to maneuver easily in turbulent waters, and can grow up to 24 centimeters in length.
界Animalia門Chordata綱Actinopterygii目Blenniiformes科Pomacentridae属Abudefduf
カテゴリ
魚類レア度
Common
危険度
1/5 · 非常に低い
スナップ
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おもしろい事実
During extreme low tides, juveniles are frequently trapped in tide pools, relying on their incredible hardiness to survive rising temperatures until the tide returns.
The genus name 'Abudefduf' is derived from Arabic, translating roughly to 'father of the prominent sides,' a nod to their deep-bodied, compressed shape.
Unlike many reef fishes that migrate to deeper, safer waters as they mature, this species spends almost its entire life in very shallow, highly turbulent waters.
When preparing a nesting site, the male Blackspot Sergeant vigorously cleans a patch of rock or dead coral and then performs a rapid mating dance to attract females.
特殊能力
能力
Surge Zone Navigation
Perfectly adapted to withstand powerful wave action, allowing them to forage safely in highly turbulent, oxygen-rich shallow waters where competitors cannot.
能力
Aggressive Nest Guarding
Males fiercely protect their benthic egg clutches from predators and territorial intruders, often charging at creatures much larger than themselves.
能力
Tide Pool Tolerance
Juveniles exhibit a remarkable biological tolerance for rapid fluctuations in salinity and temperature, enabling them to survive low tides in isolated rock pools.
サイズと詳細
- 長さ
- 10-24 cm
- 体重
- 0.05-0.3 kg
- 寿命
- 3-6 年
- Top Speed
- 15 km/h
- 一度の産卵数
- 1000-20000
- 抱卵期間
- 3-7 日
食性と食事
They are opportunistic feeders that primarily graze on benthic algae while also actively consuming a variety of small invertebrates.
年齢による違い: Juveniles rely heavily on small crustaceans found in tide pools, while mature adults graze more extensively on filamentous algae.
主な食物
- Benthic algae
- Copepods
- Amphipods
- Polychaete worms
- Zooplankton
採餌方法
- Foraging
生態系とのつながり
eaten by
Giant Moray
Gymnothorax javanicus
Larger reef predators like the Giant Moray ambush resting Blackspot Sergeants in the reef crevices at night.
competitor
Indo-Pacific Sergeant
Abudefduf vaigiensis
Competes directly for territory and algal resources on shallow reef flats.
hunts
Harpacticoid Copepod
Harpacticoida
Blackspot Sergeants actively hunt these tiny crustaceans in the water column and along the benthos.
特徴
このオブジェクトにはまだ特徴バッジが割り当てられていません。
別名
まだ別名はありません。
コレクション
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安全性
危険度
1/5 · 非常に低い
まだ特別な安全上の注意はありません。
よくある質問
Blackspot Sergeantを見分けるには？
Blackspot Sergeantを識別する最も簡単な方法は、Snappit自然識別アプリを使用することです。
Blackspot Sergeantの長さは何ですか？
10-24 cm
Blackspot Sergeantの体重は何ですか？
0.05-0.3 kg
Blackspot Sergeantの寿命は何ですか？
3-6 年
Blackspot Sergeantのtop Speedは何ですか？
15 km/h
Blackspot Sergeantは何を食べますか？
They are opportunistic feeders that primarily graze on benthic algae while also actively consuming a variety of small invertebrates.
Blackspot Sergeantは通常どこに生息していますか？
Found in the shallow waters of the Indo-Pacific, typically inhabiting wave-swept rocky shores, coral reef flats, and tidal pools.
Blackspot Sergeantはどのように狩りをしますか？
Foraging
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