Pink salmon (Oncorhynchus gorbuscha), spawning season, Prince William Sound, Alaska, United States of America, North America

Pink salmon (Oncorhynchus gorbuscha), spawning season, Port Valdez, Alaska, United States of America, North America

Christmas Island Red Crab release eggs into ocean, Gecarcoidea natalis, Christmas Island, Australia

Christmas Island Red Crab release eggs into ocean, Gecarcoidea natalis, Christmas Island, Australia

Adult Threespot Dascyllus mating, Dascyllus trimaculatus, Christmas Island, Australia

UW view of female pink salmon, Oncorhynchus gorbuscha, in the Indian River spawning near Sitka, Alaska, United States of America

Robber Crab release eggs into ocean, Birgus latro, Christmas Island, Australia

Christmas Island Red Crab release eggs into ocean, Gecarcoidea natalis, Christmas Island, Australia

Christmas Island Red Crab release eggs into ocean, Gecarcoidea natalis, Christmas Island, Australia

Robber Crab release eggs into ocean, Birgus latro, Christmas Island, Australia

Christmas Island Red Crab release eggs into ocean, Gecarcoidea natalis, Christmas Island, Australia

Christmas Island Red Crab release eggs into ocean, Gecarcoidea natalis, Christmas Island, Australia

Christmas Island Red Crab release eggs into ocean, Gecarcoidea natalis, Christmas Island, Australia

Christmas Island Red Crab release eggs into ocean, Gecarcoidea natalis, Christmas Island, Australia

Christmas Island Red Crab release eggs into ocean, Gecarcoidea natalis, Christmas Island, Australia

Shoal of Sergeant Damselfish spawning, Abudefduf vaigiensis, Red Sea, Dahab, Egypt

Christmas Island Red Crab release eggs into ocean, Gecarcoidea natalis, Christmas Island, Australia

Christmas Island Red Crab release eggs into ocean, Gecarcoidea natalis, Christmas Island, Australia

Christmas Island Red Crab release eggs into ocean, Gecarcoidea natalis, Christmas Island, Australia

Christmas Island Red Crab release eggs into ocean, Gecarcoidea natalis, Christmas Island, Australia

Adult Threespot Dascyllus mating, Dascyllus trimaculatus, Christmas Island, Australia

Adult pink salmon, Oncorhynchus gorbuscha, returning to the Indian River to spawn near Sitka, Alaska, United States of America

Christmas Island Red Crab release eggs into ocean, Gecarcoidea natalis, Christmas Island, Australia

Christmas Island Red Crab release eggs into ocean, Gecarcoidea natalis, Christmas Island, Australia

View of a male pink salmon, Oncorhynchus gorbuscha, in the Indian River spawning near Sitka, Alaska, United States of America

A porcelain crab broods eggs under its carapace, Raja Ampat, Indonesia.

Two mandarinfish spawn and release eggs, Anilao, Philippines.

Marbled grouper from the French Polynesian Islands gather in the South Pass of Fakarava to spawn just once a year, French Polynesia.

Common frog (Rana temporaria) in spawning pond, Northumberland, England, United Kingdom, Europe

Spawning chum salmon (Oncorhynchus keta) in a small river in Petra Bay, Kamchatka, Russia, Eurasia

Common frogs (Rana temporaria) in spawning pond, Northumberland, England, United Kingdom, Europe

Spawning pink salmon (Oncorhynchus gorbuscha) in a small river in Petra Bay, Kamchatka, Russia, Eurasia

Sockeye salmon (Oncorhynchus nerka), spawning on the Russian River, a 13-mile-long river on the Kenai Peninsula, Alaska, United States of America, North America

Adult pink salmon, Oncorhynchus gorbuscha, spawning in Fox Creek, Chichagof Island,, Southeast Alaska, USA.

Adult pink salmon, Oncorhynchus gorbuscha, spawning in Fox Creek, Chichagof Island,, Southeast Alaska, USA.

Adult pink salmon, Oncorhynchus gorbuscha, spawning in Port Althorp, Chichagof ,, Southeast Alaska, USA.

Adult pink salmon, Oncorhynchus gorbuscha, spawning in Fox Creek, Chichagof Island,, Southeast Alaska, USA.

Adult pink salmon, Oncorhynchus gorbuscha, spawning in Fox Creek, Chichagof Island,, Southeast Alaska, USA.

Adult pink salmon, Oncorhynchus gorbuscha, spawning in Fox Creek, Chichagof Island,, Southeast Alaska, USA.

Adult pink salmon, Oncorhynchus gorbuscha, spawning in Fox Creek, Chichagof Island,, Southeast Alaska, USA.

Adult pink salmon, Oncorhynchus gorbuscha, spawning in Fox Creek, Chichagof Island,, Southeast Alaska, USA.

Adult pink salmon, Oncorhynchus gorbuscha, spawning in Fox Creek, Chichagof Island,, Southeast Alaska, USA.

Adult pink salmon, Oncorhynchus gorbuscha, spawning in Fox Creek, Chichagof Island,, Southeast Alaska, USA.

Spawning pink salmon (Oncorhynchus gorbuscha) gathering to run upstream in Red Bluff Bay, Southeast Alaska, USA

Adult pink salmon (Oncorhynchus gorbuscha) spawning in a stream in southeast Alaska, USA.

Spawning sockeye salmon (Oncorhynchus nerka), also called red salmon or blueback salmon gathering to run upstream in the Mendenhall River just outside Juneau, Southeast Alaska, USA. Pacific Ocean

Spawning pink salmon (Oncorhynchus gorbuscha) gathering to run upstream in Red Bluff Bay, Southeast Alaska, USA

Spawning pink salmon (Oncorhynchus gorbuscha) gathering to run upstream in Red Bluff Bay, Southeast Alaska, USA

Dead and dying pink salmon (Oncorhynchus gorbuscha) gathering after the spawn just outside of Sitka, Southeast Alaska, USA

Spawning pink salmon (Oncorhynchus gorbuscha) leaping fromn the water in a stream running out of Lake Eva, Southeast Alaska, USA

Pair of mandarinfish (Synchiropus splendidus) displaying spawning behaviour, Malapascua, Cebu, Philippines, Visayan Sea, Southeast Asia, Asia

Adult pink salmon (Oncorhynchus gorbuscha) spawning in a stream in southeast Alaska, USA

Spawning pink salmon (Oncorhynchus gorbuscha) leaping in Red Bluff Bay, Southeast Alaska, USA

Spawning pink salmon (Oncorhynchus gorbuscha) leaping in Red Bluff Bay, Southeast Alaska, USA

Dead and dying pink salmon (Oncorhynchus gorbuscha) gathering after the spawn just outside of Sitka, Southeast Alaska, USA

Pair of mandarinfish (Synchiropus splendidus) displaying spawning behaviour, Malapascua, Cebu, Philippines, Visayan Sea, Southeast Asia, Asia

Adult male pink salmon (Oncorhynchus gorbuscha) spawning in a stream in southeast Alaska, USA

Spawning pink salmon (Oncorhynchus gorbuscha) leaping in Red Bluff Bay, Southeast Alaska, USA

Spawning pink salmon (Oncorhynchus gorbuscha) leaping in Red Bluff Bay, Southeast Alaska, USA

Adult pink salmon (Oncorhynchus gorbuscha) spawning in a stream in southeast Alaska, USA.

Spawning sockeye salmon (Oncorhynchus nerka), also called red salmon or blueback salmon gathering to run upstream in the Mendenhall River just outside Juneau, Southeast Alaska, USA. Pacific Ocean

Spawning sockeye salmon (Oncorhynchus nerka), also called red salmon or blueback salmon gathering to run upstream in the Mendenhall River just outside Juneau, Southeast Alaska, USA. Pacific Ocean

Adult male pink salmon (Oncorhynchus gorbuscha - nicknamed the "Humpbacked salmon") struggling to swim upstream to spawn in a stream in southeast Alaska, USA.

Dead and dying pink salmon (Oncorhynchus gorbuscha) gathering after the spawn just outside of Sitka, Southeast Alaska, USA

Adult brown bear (Ursus arctos) foraging for spawning sockeye salmon at the Brooks River in Katmai National Park near Bristol Bay, Alaska, USA. Pacific Ocean

Adult male pink salmon (Oncorhynchus gorbuscha) spawning in a stream in southeast Alaska, USA

Adult pink salmon (Oncorhynchus gorbuscha) spawning in a stream in southeast Alaska, USA.

Adult pink salmon (Oncorhynchus gorbuscha) spawning in a stream in southeast Alaska, USA.

Adult pink salmon (Oncorhynchus gorbuscha) pair spawning in a stream in southeast Alaska, USA

Spawning pink salmon (Oncorhynchus gorbuscha) leaping in Red Bluff Bay, Southeast Alaska, USA

Dead and dying pink salmon (Oncorhynchus gorbuscha) gathering after the spawn just outside of Sitka, Southeast Alaska, USA

Adult pink salmon (Oncorhynchus gorbuscha) spawning in a stream in southeast Alaska, USA

Adult brown bear (Ursus arctos) foraging for spawning sockeye salmon at the Brooks River in Katmai National Park near Bristol Bay, Alaska, USA. Pacific Ocean

Adult male pink salmon (Oncorhynchus gorbuscha) spawning in a stream in southeast Alaska, USA

Adult brown bear (Ursus arctos) foraging for spawning sockeye salmon at the Brooks River in Katmai National Park near Bristol Bay, Alaska, USA. Pacific Ocean

Adult pink salmon (Oncorhynchus gorbuscha) spawning in a stream in southeast Alaska, USA

Adult male and female pink salmon (Oncorhynchus gorbuscha - nicknamed the "Humpbacked salmon") spawning in a stream in southeast Alaska, USA.

Adult male and female pink salmon (Oncorhynchus gorbuscha - nicknamed the "Humpbacked salmon") spawning in a stream in southeast Alaska, USA.

Adult male and female pink salmon (Oncorhynchus gorbuscha - nicknamed the "Humpbacked salmon") spawning in a stream in southeast Alaska, USA.

Adult brown bear (Ursus arctos) foraging for spawning sockeye salmon at the Brooks River in Katmai National Park near Bristol Bay, Alaska, USA. Pacific Ocean

Adult male pink salmon (Oncorhynchus gorbuscha - nicknamed the "Humpbacked salmon") spawning in a stream in southeast Alaska, USA.

Adult pink salmon (Oncorhynchus gorbuscha) spawning in a stream in southeast Alaska, USA.

Heron Island with platform reef from above, cords of the coral spawning, Great Barrier Reef Marine Park, UNESCO World Heritage Site, Queensland, Australia

Gladstone peninsula during the coral spawning period, aerial photo, Gladstone, Queensland, Australia

Heron Island with platform reef from above, cords of the coral spawning, Great Barrier Reef Marine Park, UNESCO World Heritage Site, Queensland, Australia

Moor Frog (Rana arvalis) in spawning grounds at sunset, Middle Elbe Biosphere Reserve near Dessau, Saxony-Anhalt, Germany, Europe

Common Frog (Rana temporaria), spawning, Daun, Eifel, Rhineland-Palatinate, Germany, Europe

Moor frog (Rana arvalis) male, blue coloured during mating season, with spawn in spawning waters, Thuringia, Germany, Europe

Moor frog (Rana arvalis), male in the spawning grounds, Mittlere Elbe biosphere reserve on the Elbe river near Dessau, Saxony-Anhalt, Germany, Europe

Pink salmons (Oncorhynchus gorbuscha) swim densely packed upstream on their way to spawning grounds, Prince William Sound, Alaska, USA, North America

Pink salmon (Oncorhynchus gorbuscha) jumping up a waterfall on their way to spawning grounds, Prince William Sound, Alaska, USA, North America

Common toad (Bufo bufo-Komplex), Pair spawning, spawn and aquatic plants in a pond, pairing, split image, Saxony-Anhalt, Germany, Europe

Moor frogs (Rana arvalis), two males, blue coloured during mating season, with spawn in spawning waters, Thuringia, Germany, Europe

Clutches, spawn, fish spawn, eggs, fish eggs, Red Sea clownfish (Amphiprion bicinctus), red Red Sea, Aqaba, Kingdom of Jordan

Northern Crested Newt (Triturus cristatus), in the grass at the spawning water, Erftstadt, North Rhine-Westphalia, Germany, Europe

Mt Shasta CA, Big Spring Ranch Bill Chesney from the CA Dept of Fish & Game counting redds in a stretch of river that is heavily grazed by cattle who have full access to the river and often drink and eat in it. Mt Shasta in the background. The Shasta River runs through Big Springs Ranch about 20 miles north of the town of Mt Shasta. The ranch, which is contributing to degraded habitat conditions, and actually warming water temps by upwards of 10 degrees as the river passes through the ranch and then spills into the Klameth, is currently under contract for purchase by TNC. Since the contract began, TNC and partner organizations have been allowed to research this stretch of river for the first time. They have discovered that is it a very fertile juvenile rearing area and that there are a surprising number of returning salmon in spite of habitat degradation by grazing cattle (often in the river) and irrigation practices. If this purchase is successful, TNC has the chance to improve a large stretch of habitat and quickly improve conditions that will effect numbers of returning fish and habitat in the Shasta and Klameth Rivers. The Shasta River and its tributaries create one of the most important spawning nurseries for Chinook salmon in the entire Klamath Basin, United States of America

November 7, 2008 Mt Shasta CA A spawned-out Chinook salmon watches over her redd in the Shasta River where it runs through Big Springs Ranch about 2 miles north of the town of Mt Shasta. The ranch, which is contributing to degraded habitat conditions, which actually warm water tempt by upwards of 10 degrees as the river passes through the ranch and then spills into the Klameth, is currently under contract for purchase by TNC, therefor TNC and partner organizations have been allowed to research this stretch of river for the first time. They have discovered that is it a very fertile juvenile rearing area and that there are a surprising number of returning salmon in spite of habitat degraded by grazing cattle (often in the river) and irrigation practices. If this purchase is successful, TNC has the chance to improve a large stretch of habitat and quickly improve conditions that will effect numbers of returning fish and habitat in the Shasta and Klameth Rivers. In California, The Nature Conservancy is focusing its efforts on protecting the Shasta River and its tributaries, which create one of the most important spawning nurseries for Chinook salmon in the entire Klamath Basin, United States of America

November 7, 2008 Mt Shasta CA A spawned-out Chinook salmon watches over her redd in the Shasta River where it runs through Big Springs Ranch about 2 miles north of the town of Mt Shasta. The ranch, which is contributing to degraded habitat conditions, which actually warm water tempt by upwards of 10 degrees as the river passes through the ranch and then spills into the Klameth, is currently under contract for purchase by TNC, therefor TNC and partner organizations have been allowed to research this stretch of river for the first time. They have discovered that is it a very fertile juvenile rearing area and that there are a surprising number of returning salmon in spite of habitat degraded by grazing cattle (often in the river) and irrigation practices. If this purchase is successful, TNC has the chance to improve a large stretch of habitat and quickly improve conditions that will effect numbers of returning fish and habitat in the Shasta and Klameth Rivers. In California, The Nature Conservancy is focusing its efforts on protecting the Shasta River and its tributaries, which create one of the most important spawning nurseries for Chinook salmon in the entire Klamath Basin, United States of America

November 12, 2008 Mt Shasta and the Shasta River, Big Springs ranch, CA Carson Jeffres Staff Research Associate for UC Davis Center for watershed Sciences, conducting research in the Shasta River where it runs through Big Springs Ranch about 20 miles north of the town of Mt Shasta. The Shasta River and its tributaries create one of the most important spawning nurseries for Chinook salmon in the entire Klamath Basin. The ranch is contributing to degraded habitat conditions, which actually warm water temps by upwards of 10 degrees as the river passes through the ranch and then spills into the Klameth River.This stretch of river is a very fertile juvenile salmon rearing area and that there are a surprising number of returning salmon in spite of habitat degraded by grazing cattle and bad irrigation practices, United States of America

Spawning Dolly Varden char fished on Deep Creek on the Western Kenai Peninsula, Alaska September 2009. Flowing into Cook Inlet north of Homer, the waters of Deep Creek and the Anchor River host late fall runs of wild steelhead.