Speckled Swimming Crab
探検Animal
Speckled Swimming Crab
arenaeus cribrarius
The Speckled Swimming Crab (Arenaeus cribrarius) is a fascinating marine crustacean renowned for its incredible adaptation to life in the turbulent surf zone. Blending effortlessly into sandy shorelines, this active crab uses its beautiful, speckled carapace as camouflage to hide from predators and ambush prey. It is an exceptionally agile swimmer, utilizing its paddle-shaped rear legs to navigate the swirling waters of the Atlantic coast. Beachgoers and tidepool explorers often encounter these crabs buried just beneath the sand, where only their stalked eyes remain visible. Beyond its striking appearance, the Speckled Swimming Crab plays an important role in coastal ecosystems, acting as both an opportunistic predator of small invertebrates and a crucial food source for larger marine life.
生息地: Found in the shallow waters, sandy surf zones, and nearshore coastal habitats of the western Atlantic Ocean.
外見
This crab is easily recognized by its broad, light brown to olive-gray carapace, which is covered in a dense pattern of tiny, white or light yellow spots resembling a fine sieve. The carapace features a prominent, sharp spine on each side and can reach widths of up to 14 centimeters. Its most distinctive features are its paddle-shaped fifth pair of legs, adapted specifically for swimming, and its powerful, sharp claws which may display hints of blue or purple along the inner margins.
界Animalia門Arthropoda綱Malacostraca目Decapoda科Portunidae属Arenaeus
カテゴリ
Animalレア度
Common
危険度
1/5 · 非常に低い
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おもしろい事実
The scientific species name 'cribrarius' comes from the Latin word for a sieve, referencing the crab's beautifully patterned, spotted shell.
They are highly territorial and defensive; when threatened, they will raise their large, sharp claws high in the air and stand their ground instead of immediately fleeing.
Unlike terrestrial crabs, swimming crabs have their last pair of legs completely flattened into paddles, which spin like propellers to let them swim in any direction.
特殊能力
能力
Rapid Sand Burrowing
Using its specialized legs, this crab can rapidly dig backward into the sand, disappearing from view in seconds to escape predators.
能力
Paddle-Powered Swimming
The crab's hind legs are modified into flat, paddle-like appendages that allow it to swim backward, sideways, and upward with surprising agility.
能力
Sieve Camouflage
The intricate speckled pattern on its shell mimics the texture of wet sand and shell fragments, rendering the crab nearly invisible when resting on the seafloor.
サイズと詳細
- 長さ
- 5-14 cm
- 体重
- 0.05-0.3 kg
- 寿命
- 2-4 年
- Top Speed
- 4 km/h
- 一度の産卵数
- 20000-85000
- 抱卵期間
- 14-30 日
食性と食事
A generalist predator and scavenger that feeds primarily on small benthic invertebrates and organic debris found in the surf zone.
年齢による違い: Juveniles feed on smaller plankton and microscopic detritus, while adults hunt larger mollusks and small fish.
主な食物
- Clams
- Polychaete worms
- Small fishes
- Dead marine matter
- Crustaceans
採餌方法
- Ambush
生態系とのつながり
eaten by
Red Drum
Sciaenops ocellatus
The Speckled Swimming Crab is a common prey item for this large estuarine fish.
hunts
Coquina Clam
Donax variabilis
The crab uses its strong claws to crush and consume these small, beach-dwelling bivalves.
eaten by
Herring Gull
Larus argentatus
Gulls frequently snatch these crabs from the shallow surf or wet sand at low tide.
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
テーマが追加されると、このオブジェクトのコレクションがここに表示されます。
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
Speckled Swimming Crabを見分けるには？
Speckled Swimming Crab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。
Speckled Swimming Crabの長さは何ですか？
5-14 cm
Speckled Swimming Crabの体重は何ですか？
0.05-0.3 kg
Speckled Swimming Crabの寿命は何ですか？
2-4 年
Speckled Swimming Crabのtop Speedは何ですか？
4 km/h
Speckled Swimming Crabは何を食べますか？
A generalist predator and scavenger that feeds primarily on small benthic invertebrates and organic debris found in the surf zone.
Speckled Swimming Crabは通常どこに生息していますか？
Found in the shallow waters, sandy surf zones, and nearshore coastal habitats of the western Atlantic Ocean.
Speckled Swimming Crabはどのように狩りをしますか？
Ambush
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