Gill Structure

Monarch Wing Tagging at Waikiki Field Station in at a remote field station in Waikiki, Honolulu

Monarch Wing Tagging at Waikiki Field Station

Pentax K1000 · at a remote field station in Waikiki, Honolulu

 Sixgill Shark in Dalmatian Kelp Canyon in along a kelp-fringed shelf in Dalmatia

Sixgill Shark in Dalmatian Kelp Canyon

Zeiss ZX1 · along a kelp-fringed shelf in Dalmatia

 Gecko Running on Glacial Stream Surface in above a glacial stream in Pakistan

Gecko Running on Glacial Stream Surface

Nikon D750 · above a glacial stream in Pakistan

 Macro Fish Scale Growth Rings on Lichen Bark in on lichen-covered bark in Helsinki

Macro Fish Scale Growth Rings on Lichen Bark

Nikon Z 6 · on lichen-covered bark in Helsinki

 Fish Scale Growth Rings on Frosty Window in along a frost-edged windowpane near Dakar

Fish Scale Growth Rings on Frosty Window

Leica M5 · along a frost-edged windowpane near Dakar

 Mushroom Gill Macro at Brighton Dawn in along a frost-edged windowpane in Brighton and Hove

Mushroom Gill Macro at Brighton Dawn

Canon EOS 1000D · along a frost-edged windowpane in Brighton and Hove

 Axolotl in Glacial Stream Water in above a glacial stream near Sheikhupura

Axolotl in Glacial Stream Water

Canon DIGITAL IXUS · above a glacial stream near Sheikhupura

 Dragonfly Wing Cells in Highland Mist in beside a tidal inlet in the Scottish Highlands

Dragonfly Wing Cells in Highland Mist

Samsung Galaxy S25 · beside a tidal inlet in the Scottish Highlands

 Macro Feather Barbule Hooks on Salt Crystals in on salt crystals along a pan rim in Bogura

Macro Feather Barbule Hooks on Salt Crystals

Sony Alpha 100 · on salt crystals along a pan rim in Bogura

 Growth Rings on Fish Scale Near Lagos in across a rain-beaded metal surface near Lagos

Growth Rings on Fish Scale Near Lagos

Nikon D800E · across a rain-beaded metal surface near Lagos

 Feather Quill Cross Section Dawn Light in along a frost-edged windowpane in Messina

Feather Quill Cross Section Dawn Light

Leica M6 · along a frost-edged windowpane in Messina

 Bracket Fungus on Fallen Oak Near Cliff in along a salt-sprayed cliff edge in Piedmont

Bracket Fungus on Fallen Oak Near Cliff

Canon EOS 700D · along a salt-sprayed cliff edge in Piedmont

 Iridescent Giant Clam Mantle on Cebu Reef in along a coral wall with blue water beyond near Cebu

Iridescent Giant Clam Mantle on Cebu Reef

iPhone 15 · along a coral wall with blue water beyond near Cebu

 Caterpillar Prolegs Grip Twig in Gyeongju in near Gyeongju

Caterpillar Prolegs Grip Twig in Gyeongju

Zorki 4 · near Gyeongju

 Dragonfly Compound Eye Facets Glowing in Winter Drizzle in beside a tidal inlet in Kansas

Dragonfly Compound Eye Facets Glowing in Winter Drizzle

Minolta X-700 · beside a tidal inlet in Kansas

 Lagos Feather Quill Cross Section Macro in on lichen-covered bark in Lagos

Lagos Feather Quill Cross Section Macro

Nikon Z 7 II · on lichen-covered bark in Lagos

 Trilobite Compound Eye Detail Winter Drizzle in near London

Trilobite Compound Eye Detail Winter Drizzle

Nikon Z f · near London

 Gecko on Wind-Scoured Loire Ridge in on a wind-scoured ridge in the Loire Valley

Gecko on Wind-Scoured Loire Ridge

iPhone 16 Pro Max · on a wind-scoured ridge in the Loire Valley

 Gulper Eel Jaw Distended in Kelp Forest in through a forest of kelp fronds in British Columbia

Gulper Eel Jaw Distended in Kelp Forest

Sony a6100 · through a forest of kelp fronds in British Columbia

 Frigate Bird Silhouette South Korea Monsoon Ridge in on a wind-scoured ridge in South Korea

Frigate Bird Silhouette South Korea Monsoon Ridge

iPhone 16 · on a wind-scoured ridge in South Korea

 Sixgill Shark in Queensland Kelp Canyon in along a kelp-fringed shelf in Queensland

Sixgill Shark in Queensland Kelp Canyon

Minox 8x11 · along a kelp-fringed shelf in Queensland

 Moth Wing Scales and Tears in Spring Rain Liguria in in Liguria

Moth Wing Scales and Tears in Spring Rain Liguria

Olympus OM-D E-M5 Mark III · in Liguria

 Gecko Running on Water Surface Blue Hour in on a wind-scoured ridge in Gambia

Gecko Running on Water Surface Blue Hour

Olympus OM-4 · on a wind-scoured ridge in Gambia

 Frigatebird Inflated Pouch Over Glacial Stream in above a glacial stream near Agra

Frigatebird Inflated Pouch Over Glacial Stream

Leica MP · above a glacial stream near Agra

 Bracket Fungus on Fallen Oak in Gonaïves Garden in among terraced garden plots near Gonaïves

Bracket Fungus on Fallen Oak in Gonaïves Garden

Nikon D780 · among terraced garden plots near Gonaïves

 Reef Shark Gliding Over Sea Fan Wall Near Cairns in along a coral wall with blue water beyond near Cairns

Reef Shark Gliding Over Sea Fan Wall Near Cairns

Fujifilm X-H2S · along a coral wall with blue water beyond near Cairns

 Mushroom Gills in Late Afternoon Turquoise in against weathered turquoise paint in Rajshahi

Mushroom Gills in Late Afternoon Turquoise

Nikon D80 · against weathered turquoise paint in Rajshahi

 Barnacle Cirri Feeding in Dawn Light in on lichen-covered bark near Accra

Barnacle Cirri Feeding in Dawn Light

Zorki 5 · on lichen-covered bark near Accra

 Snail Radula Teeth Macro on Autumn Bark in on lichen-covered bark in Łódź

Snail Radula Teeth Macro on Autumn Bark

Nikon D7500 · on lichen-covered bark in Łódź

 Snail Radula Teeth Macro in Honey Light in on dew-soaked moss in San Carlos

Snail Radula Teeth Macro in Honey Light

Google Pixel 6 · on dew-soaked moss in San Carlos

 Purple Cabbage Spiral on Lichen Bark in on lichen-covered bark near Tabora

Purple Cabbage Spiral on Lichen Bark

Pentax K-7 · on lichen-covered bark near Tabora

 Gulper Eel Jaw Distended in Blue Sea Shafts in near Haifa

Gulper Eel Jaw Distended in Blue Sea Shafts

Samsung Galaxy S22+ · near Haifa

 Flamingos Feeding in Tidal Lagoon Near Mekelle in above a glacial stream near Mekelle

Flamingos Feeding in Tidal Lagoon Near Mekelle

Canon EOS R8 · above a glacial stream near Mekelle

 Surgeonfish School Grazing Coral Wall Belize in along a coral wall with blue water beyond near Belize City

Surgeonfish School Grazing Coral Wall Belize

Sony a1 II · along a coral wall with blue water beyond near Belize City

 Silhouetted Sixgill Shark in Deep Sea Canyon in near Devonport, Auckland

Silhouetted Sixgill Shark in Deep Sea Canyon

Fujifilm X-H1 · near Devonport, Auckland

 Feather Quill Cross Section on Rainy Metal in across a rain-beaded metal surface in Nanning

Feather Quill Cross Section on Rainy Metal

Sony a6700 · across a rain-beaded metal surface in Nanning

 Fig Cross Section Seed Structure Maputo in inside a seed pod split open in Maputo

Fig Cross Section Seed Structure Maputo

iPhone 13 mini · inside a seed pod split open in Maputo

 Ancient Oak Bark Ridges Macro Close-Up in across a rain-beaded metal surface near Séguéla

Ancient Oak Bark Ridges Macro Close-Up

Canon EOS 5D Mark III · across a rain-beaded metal surface near Séguéla

 Gannets on Haifa Cliffs Under Ringed Planet in near Haifa

Gannets on Haifa Cliffs Under Ringed Planet

Canon EOS 650D · near Haifa

 Silhouette Bracket Fungus on Fallen Oak Gambia in in Gambia

Silhouette Bracket Fungus on Fallen Oak Gambia

Olympus XA · in Gambia