A diver examines the wall of a swim-through arch underneath an offshore island in Molokai, Hawai'i. 2017.
       
     
 Healthy coral cover around the island of Ofu in Manua at the National Park of American Samoa. 2017.
       
     
 A diver horizontally forces a circular vortex of water away from his body on a safety stop at Dry Tortugas National Park, Florida. 2017.
       
     
 The stars over Waikolu Stream in Molokai at Kalaupapa National Historic Park. 2017.
       
     
 A manta ray gets up close with two divers in Kona, Hawai’i. 2017.
       
     
 A goliath grouper opens wide to catch lunch, eagerly swimming away at Dry Tortugas National Park, Florida. 2017.
       
     
 Juvenile jacks live inside of a moon jelly for protection at Dry Tortugas National Park, Florida. 2017.
       
     
 A diver, towered by an air pocket, stops to take a picture of a swim-through arch underneath an offshore island in Molokai, Hawai'i. 2017.
       
     
 A school of silversides swim underneath the pier at Dry Tortugas National Park, Florida. 2017.
       
     
 A green turtle touches my dome port in the shallow waters of the aiopio at Kaloko-Honokohau National Historical Park, Hawai'i. 2017.
       
     
 A snorkeler swims up to a goliath grouper at Dry Tortugas National Park, Florida. 2017.
       
     
 A photographer checks out the young autumn kelp plants on Anacapa Island, California. 2018.
       
     
 The lighthouse on Loggerhead Key at Dry Tortugas National Park, Florida. 2017.
       
     
 A barracuda swims menacingly under a school of jacks around Loggerhead Key at Dry Tortugas National Park, Florida. 2017.
       
     
 A healthy reef in the Florida Keys National Marine Sanctuary. 2017.
       
     
 A National Park Service diver swims over the three most forward in-tact guns of the USS Arizona at Valor in the Pacific National Monument in O'ahu, Hawai'i. 2017.
       
     
 A school of goatfish swims across a reef in the Florida Keys National Marine Sanctuary. 2017.
       
     
 A National Park Service biologist shows off a native snail during a survey in the Waikolu Stream at Kalaupapa National Historic Park on Molokai. 2017.
       
     
 A school of small jacks swims quickly in the shallow waters of Virgin Islands National Park in St. John. in the Florida Keys National Marine Sanctuary. 2017.
       
     
 A National Park Service team removes a ghost fishing net from the reef around Ofu Island in the National Park of American Samoa. 2017.
       
     
 A diver hangs out at her safety stop in the middle of the ocean near Kaloko-Honokohau National Historical Park, Hawai'i. 2017.
       
     
 A scientist records coral data in around Ofu, American Samoa. 2017.
       
     
 A National Park Service diver begins a benthic survey with a full face mask rig around Anacapa Island at Channel Islands National Park, California. 2017.
       
     
 A Manta cruises closely overhead in Kona, Hawai'i. 2017.
       
     
 Light beams down on a goliath grouper in Dry Tortugas National Park, Florida. 2017.
       
     
 Two NOAA divers begin a survey during a conch tagging expedition in St. Croix, US Virgin Islands. 2017.
       
     
 A turtle just below the surface in Ostional, Costa Rica. 2018
       
     
 A diver surveys a reef on a Reef Check survey in the Florida Keys. 2017.
       
     
 Graduate students take a core sample around Buck Island in St. Croix, US Virgin Islands. 2017.
       
     
 A National Park Service diver ascends to safety stop depth at Virgin Islands National Park in St. John. 2017.
       
     
 A scrawled filefish in the Florida Keys National Marine Sanctuary. 2017.
       
     
 A NOAA diver works on a coral survey in Virgin Islands National Park on St. John. 2017.
       
     
 A National Park Service diver checks out a passing giant sea bass at Channel Islands National Park, California. 2017.
       
     
 A National Park Service diver shows off a speared lionfish at Biscayne National Park, Florida. 2017.
       
     
 A diver injects cow bile into a crown of thorns seastar to help control the population of these coral eating stars. Ofu Island, American Samoa. 2017.
       
     
 A bright school of fish congregates in the shallow waters around Ofu Island at the National Park of American Samoa. 2017.
       
     
 Self portrait in Hoyo Azul, Dominican Republic. 2014.
       
     
 A diver examines the wall of a swim-through arch underneath an offshore island in Molokai, Hawai'i. 2017.
       
     

A diver examines the wall of a swim-through arch underneath an offshore island in Molokai, Hawai'i. 2017.

 Healthy coral cover around the island of Ofu in Manua at the National Park of American Samoa. 2017.
       
     

Healthy coral cover around the island of Ofu in Manua at the National Park of American Samoa. 2017.

 A diver horizontally forces a circular vortex of water away from his body on a safety stop at Dry Tortugas National Park, Florida. 2017.
       
     

A diver horizontally forces a circular vortex of water away from his body on a safety stop at Dry Tortugas National Park, Florida. 2017.

 The stars over Waikolu Stream in Molokai at Kalaupapa National Historic Park. 2017.
       
     

The stars over Waikolu Stream in Molokai at Kalaupapa National Historic Park. 2017.

 A manta ray gets up close with two divers in Kona, Hawai’i. 2017.
       
     

A manta ray gets up close with two divers in Kona, Hawai’i. 2017.

 A goliath grouper opens wide to catch lunch, eagerly swimming away at Dry Tortugas National Park, Florida. 2017.
       
     

A goliath grouper opens wide to catch lunch, eagerly swimming away at Dry Tortugas National Park, Florida. 2017.

 Juvenile jacks live inside of a moon jelly for protection at Dry Tortugas National Park, Florida. 2017.
       
     

Juvenile jacks live inside of a moon jelly for protection at Dry Tortugas National Park, Florida. 2017.

 A diver, towered by an air pocket, stops to take a picture of a swim-through arch underneath an offshore island in Molokai, Hawai'i. 2017.
       
     

A diver, towered by an air pocket, stops to take a picture of a swim-through arch underneath an offshore island in Molokai, Hawai'i. 2017.

 A school of silversides swim underneath the pier at Dry Tortugas National Park, Florida. 2017.
       
     

A school of silversides swim underneath the pier at Dry Tortugas National Park, Florida. 2017.

 A green turtle touches my dome port in the shallow waters of the aiopio at Kaloko-Honokohau National Historical Park, Hawai'i. 2017.
       
     

A green turtle touches my dome port in the shallow waters of the aiopio at Kaloko-Honokohau National Historical Park, Hawai'i. 2017.

 A snorkeler swims up to a goliath grouper at Dry Tortugas National Park, Florida. 2017.
       
     

A snorkeler swims up to a goliath grouper at Dry Tortugas National Park, Florida. 2017.

 A photographer checks out the young autumn kelp plants on Anacapa Island, California. 2018.
       
     

A photographer checks out the young autumn kelp plants on Anacapa Island, California. 2018.

 The lighthouse on Loggerhead Key at Dry Tortugas National Park, Florida. 2017.
       
     

The lighthouse on Loggerhead Key at Dry Tortugas National Park, Florida. 2017.

 A barracuda swims menacingly under a school of jacks around Loggerhead Key at Dry Tortugas National Park, Florida. 2017.
       
     

A barracuda swims menacingly under a school of jacks around Loggerhead Key at Dry Tortugas National Park, Florida. 2017.

 A healthy reef in the Florida Keys National Marine Sanctuary. 2017.
       
     

A healthy reef in the Florida Keys National Marine Sanctuary. 2017.

 A National Park Service diver swims over the three most forward in-tact guns of the USS Arizona at Valor in the Pacific National Monument in O'ahu, Hawai'i. 2017.
       
     

A National Park Service diver swims over the three most forward in-tact guns of the USS Arizona at Valor in the Pacific National Monument in O'ahu, Hawai'i. 2017.

 A school of goatfish swims across a reef in the Florida Keys National Marine Sanctuary. 2017.
       
     

A school of goatfish swims across a reef in the Florida Keys National Marine Sanctuary. 2017.

 A National Park Service biologist shows off a native snail during a survey in the Waikolu Stream at Kalaupapa National Historic Park on Molokai. 2017.
       
     

A National Park Service biologist shows off a native snail during a survey in the Waikolu Stream at Kalaupapa National Historic Park on Molokai. 2017.

 A school of small jacks swims quickly in the shallow waters of Virgin Islands National Park in St. John. in the Florida Keys National Marine Sanctuary. 2017.
       
     

A school of small jacks swims quickly in the shallow waters of Virgin Islands National Park in St. John. in the Florida Keys National Marine Sanctuary. 2017.

 A National Park Service team removes a ghost fishing net from the reef around Ofu Island in the National Park of American Samoa. 2017.
       
     

A National Park Service team removes a ghost fishing net from the reef around Ofu Island in the National Park of American Samoa. 2017.

 A diver hangs out at her safety stop in the middle of the ocean near Kaloko-Honokohau National Historical Park, Hawai'i. 2017.
       
     

A diver hangs out at her safety stop in the middle of the ocean near Kaloko-Honokohau National Historical Park, Hawai'i. 2017.

 A scientist records coral data in around Ofu, American Samoa. 2017.
       
     

A scientist records coral data in around Ofu, American Samoa. 2017.

 A National Park Service diver begins a benthic survey with a full face mask rig around Anacapa Island at Channel Islands National Park, California. 2017.
       
     

A National Park Service diver begins a benthic survey with a full face mask rig around Anacapa Island at Channel Islands National Park, California. 2017.

 A Manta cruises closely overhead in Kona, Hawai'i. 2017.
       
     

A Manta cruises closely overhead in Kona, Hawai'i. 2017.

 Light beams down on a goliath grouper in Dry Tortugas National Park, Florida. 2017.
       
     

Light beams down on a goliath grouper in Dry Tortugas National Park, Florida. 2017.

 Two NOAA divers begin a survey during a conch tagging expedition in St. Croix, US Virgin Islands. 2017.
       
     

Two NOAA divers begin a survey during a conch tagging expedition in St. Croix, US Virgin Islands. 2017.

 A turtle just below the surface in Ostional, Costa Rica. 2018
       
     

A turtle just below the surface in Ostional, Costa Rica. 2018

 A diver surveys a reef on a Reef Check survey in the Florida Keys. 2017.
       
     

A diver surveys a reef on a Reef Check survey in the Florida Keys. 2017.

 Graduate students take a core sample around Buck Island in St. Croix, US Virgin Islands. 2017.
       
     

Graduate students take a core sample around Buck Island in St. Croix, US Virgin Islands. 2017.

 A National Park Service diver ascends to safety stop depth at Virgin Islands National Park in St. John. 2017.
       
     

A National Park Service diver ascends to safety stop depth at Virgin Islands National Park in St. John. 2017.

 A scrawled filefish in the Florida Keys National Marine Sanctuary. 2017.
       
     

A scrawled filefish in the Florida Keys National Marine Sanctuary. 2017.

 A NOAA diver works on a coral survey in Virgin Islands National Park on St. John. 2017.
       
     

A NOAA diver works on a coral survey in Virgin Islands National Park on St. John. 2017.

 A National Park Service diver checks out a passing giant sea bass at Channel Islands National Park, California. 2017.
       
     

A National Park Service diver checks out a passing giant sea bass at Channel Islands National Park, California. 2017.

 A National Park Service diver shows off a speared lionfish at Biscayne National Park, Florida. 2017.
       
     

A National Park Service diver shows off a speared lionfish at Biscayne National Park, Florida. 2017.

 A diver injects cow bile into a crown of thorns seastar to help control the population of these coral eating stars. Ofu Island, American Samoa. 2017.
       
     

A diver injects cow bile into a crown of thorns seastar to help control the population of these coral eating stars. Ofu Island, American Samoa. 2017.

 A bright school of fish congregates in the shallow waters around Ofu Island at the National Park of American Samoa. 2017.
       
     

A bright school of fish congregates in the shallow waters around Ofu Island at the National Park of American Samoa. 2017.

 Self portrait in Hoyo Azul, Dominican Republic. 2014.
       
     

Self portrait in Hoyo Azul, Dominican Republic. 2014.