Frostfish massacre in Cook Strait

July 7th, 2023 § 0

An unseasonably calm winter’s day took me well offshore exploring by boat into Cook Strait where I witnessed and recorded a wildlife feeding frenzy not often seen, and it was included in a NZ Geographic article here: https://www.nzgeo.com/stories/frosty-reception/.  In the water, New Zealand fur seals (Arctocephalus forsteri) were diving to catch Frostfish (Lepidopus caudatus), a very long almost snake like fish, but their length required the seal to bring the fish to the surface in order the thrash and rip them apart, taking several minutes per fish.

64624MF00-New Zealand fur seal (Arctocephalus forsteri) ripping apart Frostfish (Lepidopus caudatus) it's brought up from depth. Winter. Cook Strait, Wellington City District, North Island, NZThe splashing and commotion caused a large collection of Mollymawks (small albatrosses) to arrive and battle over any morsels flung from the grisly massacre taking place.

64634CD00-White-capped Mollymawk (Thalassarche cauta steadi, formerly Diomedea cauta) feeding on remnant morsels left by New Zealand fur seal (Arctocephalus forsteri) shredding Frostfish (Lepidopus caudatus). NZ

Travelling around by boat I discovered this feeding activity associated with every shallower undersea mount in an otherwise 300m deep sea

64626MF00-New Zealand fur seal (Arctocephalus forsteri) ripping apart Frostfish (Lepidopus caudatus) it's brought up from depth. Winter. Cook Strait, Wellington City District, North Island, NZ

It was a unique experience to visit the area, often far too inhospitable to visit in small vessels, and to hang out with wildlife not often seen close to shore like these beautiful Mollymawks

64614CD00-White-capped Mollymawk albatross sitting on ocean (Thalassarche cauta steadi, formerly Diomedea cauta). Shy Albatross. NZ64630MF00-New Zealand fur seal (Arctocephalus forsteri) and White-capped Mollymawk (Thalassarche cauta steadi, formerly Diomedea cauta) together in feeding association. NZ

To see more frostfish massacre images go here, and Mollymawk images here.

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