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  • This is an Indian anchovy (Stolephorus indicus), one of the anchovy species that Eden’s whales (Balaenoptera edeni edeni) feed upon in the Gulf of Thailand. It is also a primary ingredient for fish sauce, as well as many other foods in Thailand and Southeast Asia.
    indian-anchovy-stelophorus-indicus-g...tif
  • This small fish, likely a species of sardine, jumped aboard our boat when Eden’s whales were engaged in lunge feeding in the Gulf of Thailand. I believe it likely that the lunge feeding technique is suited to hunting this type of fish, perhaps due to density of aggregations and/ or behavioral characteristics. The whales appear to herd fish into ever greater concentrations before lunging through the aggregated fish. The same whales do not seem to do this with the anchovy species in the Gulf. This suggests that the whales apply different strategies for different prey.
    sardinella-prey-for-balaenoptera-ede...tif
  • This is an adult female Eden’s whale (Balaenoptera edeni edeni) named Mae Gunya and her calf Jao Khamsamut feeding on anchovies in the shallow waters of the upper Gulf of Thailand. Around them are whiskered terns (Chlidonias hybrida) flying in to grab fish brought up by the whales.
    edens-whale-mother-calf-feeding-anch...tif
  • Adult female Eden’s whale (Balaenoptera edeni edeni) feeding on anchovies with her calf. These whales are part of an isolated population of Eden’s whales, which are a neritic member of the Bryde’s whale complex, that live in the shallow waters of the Gulf of Thailand. It is likely that there are 50 or less in the population. This adult is known as Mae Gunya. Her calf is Jao Khamsamut.
    eden-brydes-whale-mother-and-calf-fe...tif
  • Adult female Eden’s whale (Balaenoptera edeni edeni) feeding on anchovies with her calf. These whales are part of an isolated population of Eden’s whales, which are a neritic member of the Bryde’s whale complex, that live in the shallow waters of the Gulf of Thailand. It is likely that there are 50 or less in the population. This adult is known as Mae Gunya. Her calf is Jao Khamsamut.
    eden-whale-brydes-feeding-anchovies-...tif
  • This is a male Eden’s whale (Balaenoptera edeni edeni) known as Mesa, demonstrating the Drawbridge technique for feeding on anchovies. The whale raises his head above water to approximately eye level, then drops his lower jaw rapidly as if lowering a drawbridge. He then maintains a stationary, mouth-open position for an extended period of time, sometimes up to 30 seconds, during which time anchovies jump into his mouth. When he collects sufficient fish, he closes his mouth and reenters the water. Mesa is part of an isolated population of Eden’s whales, which are a neritic member of the Bryde’s whale complex, that live in the shallow waters of the Gulf of Thailand. It is likely that there are 50 or less in the population. Photo 7 in sequence of 7 photos illustrating beginning of Drawbridge technique.
    eden-whale-male-mesa-drawbridge-feed...tif
  • This is a male Eden’s whale (Balaenoptera edeni edeni) known as Mesa, demonstrating the Drawbridge technique for feeding on anchovies. The whale raises his head above water to approximately eye level, then drops his lower jaw rapidly as if lowering a drawbridge. He then maintains a stationary, mouth-open position for an extended period of time, sometimes up to 30 seconds, during which time anchovies jump into his mouth. When he collects sufficient fish, he closes his mouth and reenters the water. Mesa is part of an isolated population of Eden’s whales, which are a neritic member of the Bryde’s whale complex, that live in the shallow waters of the Gulf of Thailand. It is likely that there are 50 or less in the population. Photo 2 in sequence of 7 photos illustrating beginning of Drawbridge technique.
    eden-whale-male-mesa-drawbridge-feed...tif
  • This is a male Eden’s whale (Balaenoptera edeni edeni) known as Mesa, demonstrating the Drawbridge technique for feeding on anchovies. The whale raises his head above water to approximately eye level, then drops his lower jaw rapidly as if lowering a drawbridge. He then maintains a stationary, mouth-open position for an extended period of time, sometimes up to 30 seconds, during which time anchovies jump into his mouth. When he collects sufficient fish, he closes his mouth and reenters the water. Mesa is part of an isolated population of Eden’s whales, which are a neritic member of the Bryde’s whale complex, that live in the shallow waters of the Gulf of Thailand. It is likely that there are 50 or less in the population. Photo 1 in sequence of 7 photos illustrating beginning of Drawbridge technique.
    eden-whale-male-mesa-drawbridge-feed...tif
  • This is a male Eden’s whale (Balaenoptera edeni edeni) known as Mesa, demonstrating the Drawbridge technique for feeding on anchovies. The whale raises his head above water to approximately eye level, then drops his lower jaw rapidly as if lowering a drawbridge. He then maintains a stationary, mouth-open position for an extended period of time, sometimes up to 30 seconds, during which time anchovies jump into his mouth. When he collects sufficient fish, he closes his mouth and reenters the water. Mesa is part of an isolated population of Eden’s whales, which are a neritic member of the Bryde’s whale complex, that live in the shallow waters of the Gulf of Thailand. It is likely that there are 50 or less in the population. Photo 6 in sequence of 7 photos illustrating beginning of Drawbridge technique.
    eden-whale-male-mesa-drawbridge-feed...tif
  • This is a male Eden’s whale (Balaenoptera edeni edeni) known as Mesa, demonstrating the Drawbridge technique for feeding on anchovies. The whale raises his head above water to approximately eye level, then drops his lower jaw rapidly as if lowering a drawbridge. He then maintains a stationary, mouth-open position for an extended period of time, sometimes up to 30 seconds, during which time anchovies jump into his mouth. When he collects sufficient fish, he closes his mouth and reenters the water. Mesa is part of an isolated population of Eden’s whales, which are a neritic member of the Bryde’s whale complex, that live in the shallow waters of the Gulf of Thailand. It is likely that there are 50 or less in the population. Photo 4 in sequence of 7 photos illustrating beginning of Drawbridge technique.
    eden-whale-male-mesa-drawbridge-feed...tif
  • This is a male Eden’s whale (Balaenoptera edeni edeni) known as Mesa, demonstrating the Drawbridge technique for feeding on anchovies. The whale raises his head above water to approximately eye level, then drops his lower jaw rapidly as if lowering a drawbridge. He then maintains a stationary, mouth-open position for an extended period of time, sometimes up to 30 seconds, during which time anchovies jump into his mouth. When he collects sufficient fish, he closes his mouth and reenters the water. Mesa is part of an isolated population of Eden’s whales, which are a neritic member of the Bryde’s whale complex, that live in the shallow waters of the Gulf of Thailand. It is likely that there are 50 or less in the population. Photo 3 in sequence of 7 photos illustrating beginning of Drawbridge technique.
    eden-whale-male-mesa-drawbridge-feed...tif
  • This is a male Eden’s whale (Balaenoptera edeni edeni) known as Mesa, demonstrating the Drawbridge technique for feeding on anchovies. The whale raises his head above water to approximately eye level, then drops his lower jaw rapidly as if lowering a drawbridge. He then maintains a stationary, mouth-open position for an extended period of time, sometimes up to 30 seconds, during which time anchovies jump into his mouth. When he collects sufficient fish, he closes his mouth and reenters the water. Mesa is part of an isolated population of Eden’s whales, which are a neritic member of the Bryde’s whale complex, that live in the shallow waters of the Gulf of Thailand. It is likely that there are 50 or less in the population. Photo 5 in sequence of 7 photos illustrating beginning of Drawbridge technique.
    eden-whale-male-mesa-drawbridge-feed...tif
  • A lone Eden’s whale (Balaenoptera edeni edeni) holding its mouth open to feed on anchovies in the Gulf of Thailand, with birds swooping in to grab fish jumping out of the water.
    lone-eden-whale-mouth-open-feeding-2...tif
  • Pronounced dorsal fin of a Bryde’s whale (Balaenoptera edeni edeni) in the shallow waters of the upper Gulf of Thailand. This whale was one of three that were foraging on anchovies. This whale's name is Jao Taengthai.
    brydes-whale-dorsal-gulf-thailand-20...tif
  • GPS track showing the circular feeding pattern of an Eden’s whale (Balaenoptera edeni edeni) revolving around an area in which the whale has found a concentration of anchovies.
    edens-whale-feeding-gps-track-gulf-t...tif
  • Male Eden’s whale (Balaenoptera edeni edeni) known as Maesa (which means April) engaging in a feeding technique suited for the shallow waters of the Gulf of Thailand. After finding a suitable quantity of prey, the whale opens his mouth at the surface while stirring up the shallow water and sediment with his fluke. This causes small fish (anchovies in this case) to panic, with many inadvertently jumping into his mouth. Sometimes whiskered terns (Chlidonias hybrida) make use of this foraging behavior to grab an easy meal, as seen here. Maesa is part of an isolated population of Eden’s whales, which are a neritic member of the Bryde’s whale complex, that live in the shallow waters of the Gulf of Thailand. It is likely that there are 50 or less in the population.
    edens-whale-foraging-anchovies-gulf-...tif
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