Blackside Snubnose Darter

etheostoma duryi

The Blackside Snubnose Darter is a small, energetic freshwater fish endemic to the pristine streams and creeks of the Tennessee River drainage in the southeastern United States. Belonging to the diverse darter family, this species is named for the dark, square-shaped blotches lining its sides and its uniquely blunt snout. While typically displaying subtle, earthy camouflaged tones, males undergo a spectacular transformation during the spring breeding season, flaring vibrant reds, oranges, and greens along their fins and underbellies. These benthic fish are captivating to watch as they hop, skip, and dart across gravelly creek beds in search of tiny aquatic prey. Their presence is a classic indicator of clean, oxygen-rich stream ecosystems, making them a favorite find for keen stream explorers and conservationists alike.

生息地: Found in clear, rocky creeks and small rivers, typically resting in pools and slow-moving riffles with gravel or cobble substrates.

外見

This small, slender darter averages 5 to 7 centimeters in length and is distinguished by a blunt, rounded snout and a series of dark, blackish blotches along its midline. The base coloration is olive-tan, which provides excellent camouflage against gravelly stream bottoms. Breeding males showcase brilliant coloration, including a bright orange-red band in the spinous dorsal fin, a blue-green edge, and warm orange wash on the breast and belly. Their eyes are placed high on the head, and they lack a swim bladder, keeping them close to the substrate.

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

Blackside Snubnose 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

Because they lack a functional swim bladder, they sink to the bottom when they stop moving, effectively spending their entire lives on the riverbed.

The 'snubnose' name comes from their short, rounded facial profile, which is perfectly adapted for nudging rocks to stir up hidden insect prey.

Unlike most fish that spawn in open water, female snubnose darters carefully attach their sticky eggs individually or in small clusters to the undersides of rocks or submerged plants.

特殊能力

Lacking a fully functional swim bladder, this fish uses its large, fan-like pectoral fins to hop and sit directly on the stream floor rather than swimming in open water.

During the spring breeding season, males can rapidly enhance their color intensity to exhibit striking oranges and iridescent blues to attract females and ward off competitors.

Their speckled olive and tan dorsal patterning mimics the exact textures of river gravel and sand, allowing them to remain virtually invisible to predators from above.

サイズと詳細

長さ: 4-8 cm
体重: 0.002-0.006 kg
寿命: 2-4 年
Top Speed: 5 km/h
一度の産卵数: 50-150
抱卵期間: 7-14 日

食性と食事

They primarily feed on small aquatic invertebrates and insect larvae found on the stream floor, using their snub noses to poke into gravel.

主な食物

Midge larvae
Mayfly nymphs
Caddisfly larvae
Copepods

採餌方法

Foragingpositioningedgewiseedgingintoallrocksandpebblestobringupinsectprey.theblacksidesnubnosedarteractivelyforagesbysensingvibrationsandvisuallyspottingmicroscopicpreymovementsalongthesubstrate.thespeciesisessentiallyabenthicopportunisticfeeder.juvenilesfeedonmicroscopicplanktonandsmallrotifers,transitioningtolargerinsectlarvaeasmaturefishes.thefishutilizesitssnubnosetoforagewithingravelcrevices.thehuntisdoneviaactivesearchingandforaging Ratherthanambushorpursuit.thesnubnosedshapeisextremelyadaptivetothistypeoffeeding.thesedartersalsorightthemselvesonpebblebottomsandstabythemselveswithfinswhilesearching.thespeciesmainlyforagesforthesepreyitemsduringthedaylight.theyremainsactiveprimarilyintheshallowsandgravelriffles.aspecializedbenthicforagingstrategyisemployedasprimaryhuntingmethod.foragingonbenthosistheirmsourcelivelihood.thedietprimarilyconsistsofsmallaquaticarthropods.thishelpsmaintainthespecies'energybalance.theirpreyisabundantinriffles.thematurespecimensconsumewiderarrayofpreythanyoungerfry.theyrelymostlyoninsectlarvae.theypreyontheseforhours.

生態系とのつながり

hunts

Mayfly

Baetis tricaudatus

Predates on the larvae of this common aquatic insect found under stones.

eaten by

Largemouth Bass

Micropterus salmoides

Predates on the Blackside Snubnose Darter in deeper river pools.

competitor

Greenside Darter

Etheostoma blennioides

Competes for benthic macroinvertebrates in the same gravel riffles.

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

Blackside Snubnose Darterを見分けるには？

Blackside Snubnose 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。

Blackside Snubnose Darterの長さは何ですか？

4-8 cm

Blackside Snubnose Darterの体重は何ですか？

0.002-0.006 kg

Blackside Snubnose Darterの寿命は何ですか？

2-4 年

Blackside Snubnose Darterのtop Speedは何ですか？

5 km/h

Blackside Snubnose Darterは何を食べますか？

They primarily feed on small aquatic invertebrates and insect larvae found on the stream floor, using their snub noses to poke into gravel.

Blackside Snubnose Darterは通常どこに生息していますか？

Found in clear, rocky creeks and small rivers, typically resting in pools and slow-moving riffles with gravel or cobble substrates.

Blackside Snubnose Darterはどのように狩りをしますか？

Foragingpositioningedgewiseedgingintoallrocksandpebblestobringupinsectprey.theblacksidesnubnosedarteractivelyforagesbysensingvibrationsandvisuallyspottingmicroscopicpreymovementsalongthesubstrate.thespeciesisessentiallyabenthicopportunisticfeeder.juvenilesfeedonmicroscopicplanktonandsmallrotifers,transitioningtolargerinsectlarvaeasmaturefishes.thefishutilizesitssnubnosetoforagewithingravelcrevices.thehuntisdoneviaactivesearchingandforaging Ratherthanambushorpursuit.thesnubnosedshapeisextremelyadaptivetothistypeoffeeding.thesedartersalsorightthemselvesonpebblebottomsandstabythemselveswithfinswhilesearching.thespeciesmainlyforagesforthesepreyitemsduringthedaylight.theyremainsactiveprimarilyintheshallowsandgravelriffles.aspecializedbenthicforagingstrategyisemployedasprimaryhuntingmethod.foragingonbenthosistheirmsourcelivelihood.thedietprimarilyconsistsofsmallaquaticarthropods.thishelpsmaintainthespecies'energybalance.theirpreyisabundantinriffles.thematurespecimensconsumewiderarrayofpreythanyoungerfry.theyrelymostlyoninsectlarvae.theypreyontheseforhours.