The Scabbard^ or Frost^fish 



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and cast itself up on the beach. 

 This happens with tolerable cer- 

 tainty during the autumn and 

 winter months, when the sea is 

 calm and the nights frosty. Then 

 the frost-fish come ashore alive, 

 wriggling through the surf on 

 to the beach. Two explanations 

 have been offered for this extra- 

 ordinary conduct. One is that 

 the fish commits suicide ; being 

 pursued by a shark or other enemy, 

 it prefers uncertain life on land 

 to certain death at sea ! The 

 other and more probable hypothesis 

 has it that the air-bladder of the 

 fish becomes distended to enable 

 it to reach the surface for food 

 for it is a deep-sea fish and 

 that the keen, frosty air prevents 

 it from compressing the bladder 



and returning to the depths ; thus it gradually drifts into shallow water, is hurled shorewards 

 by the surf, and finally wriggles itself on to the beach to die. The long stretches of sandy 

 beach a few miles from Dunedin are a favourite resort for frost-fish catching. Two or three 

 men camp out at the foot of the cliffs overhanging the beach, pitching a tent and lighting 

 a huge fire, so as to render life bearable during the long vigils. The " fishing" consists in 

 perambulating the beach up and down shortly before dawn, and keeping a sharp look-out in 

 the surf for the silver streak which betokens the approach of a victim. As soon as a fish is 



Photo by W. Saville-Kent, F.Z.S.] 



FRINGED HORSE-MACKEREL. 

 Note the great length of the fin-rays. 



[3filford-on-Sea. 



Photo by Reinhold Thielc & Co.] 



HORSE-MACKEREL. 



The strong keel formed by ridged scales running down each side of the tail is a characteristic feature. 



[Chancery Lane, W.C- 



