Blackfin Darter

etheostoma nigripinne

The Blackfin Darter is a charming, bottom-dwelling freshwater fish native to the Tennessee River basin in the southeastern United States. These small, slender fish are members of the perch family and are renowned for their active hopping movements along stream beds rather than sustained swimming. During the spring breeding season, males undergo a dramatic color transformation, developing striking dark fins that give the species its common name. Observing these miniature spectacles of nature offers a glimpse into the rich, hidden biodiversity of North American aquatic ecosystems. Their presence is a great indicator of clean, well-oxygenated stream habitats.

生息地: Found in small- to medium-sized rocky creeks and headwater streams, typically preferring shallow pools or slow-flowing riffles with plentiful gravel, cobble, or flat rocks for shelter.

外見

The Blackfin Darter is a small, elongated fish reaching about 5 to 8 centimeters in length. It features a mottled brown or tan body with darker saddle-like bands across its back, providing excellent camouflage against gravelly stream bottoms. Breeding males are particularly distinctive, showcasing darkened pelvic and anal fins, along with a prominent black pigment band on their dorsal fins. They possess a blunt snout and large, upward-looking eyes adapted for surveying the water column for tiny prey.

界Animalia門Chordata綱Actinopterygii目Perciformes科Percidae属Etheostoma

Blackfin Darter

カテゴリ

魚類

レア度

Common

危険度

1/5 · 非常に低い

スナップ

最初にスナップしよう！

おもしろい事実

Spawning pairs lay their eggs on the undersides of flat rocks, and males aggressively defend the nesting territory from intruders.

Their movement style has been compared to a frog's leap, utilizing quick darting bursts followed by motionless pauses.

Unlike many typical fish, Blackfin Darters lack a functional swim bladder, which keeps them sinking to the stream bed where they live.

特殊能力

Using enlarged pectoral fins, the darter hops along the stream bed rather than swimming, saving energy in fast currents.

During spawning, males rapidly develop deep black pigmentation on their fins to signal maturity and attract females.

Their intricate mottled pattern breaks up their silhouette, making them nearly invisible to overhead predators like herons.

サイズと詳細

長さ: 5-8 cm
体重: 0.001-0.005 kg
寿命: 2-3 年
抱卵期間: 10-20 日

食性と食事

Feeds primarily on small benthic macroinvertebrates, especially aquatic insect larvae, which they pick from the substrate.

年齢による違い: Juveniles consume smaller microcrustaceans such as copepods, transitioning to larger insect larvae as they mature.

主な食物

Midge larvae
Mayfly nymphs
Caddisfly larvae
Copepods

採餌方法

Foraging

生態系とのつながり

eaten by

Rock Bass

Ambloplites rupestris

Acts as a prey item for larger predatory fish in headwater streams.

hunts

Flatheaded Mayfly

Stenonema femoratum

Consumes abundant larvae of mayflies living under stones.

competitor

Fantail Darter

Etheostoma flabellare

Shares similar rocky stream habitats and feeds on the same benthic invertebrates.

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

Blackfin Darterを見分けるには？

Blackfin Darter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。

Blackfin Darterの長さは何ですか？

5-8 cm

Blackfin Darterの体重は何ですか？

0.001-0.005 kg

Blackfin Darterの寿命は何ですか？

2-3 年

Blackfin Darterは何を食べますか？

Feeds primarily on small benthic macroinvertebrates, especially aquatic insect larvae, which they pick from the substrate.

Blackfin Darterは通常どこに生息していますか？

Found in small- to medium-sized rocky creeks and headwater streams, typically preferring shallow pools or slow-flowing riffles with plentiful gravel, cobble, or flat rocks for shelter.

Blackfin Darterはどのように狩りをしますか？

Foraging

Blackfin Darterの抱卵期間は何ですか？

10-20 日