referring firstly to fig1 to 9 of the drawings , the fishing lure illustrated therein is a simulated sand - eel . the fish body has an upper body portion a which includes the tail portion 1 and a lower body portion b which has a through - bore 5 to receive the shank of a fishing hook 10 shown in broken lines in fig1 and the line 11 attached to the eye of the hook . the upper and lower body portions a and b are separated by a longitudinal slot 2 which extends from behind the gills of the simulated fish body towards the head . the slot 2 allows the upper body portion a and tail portion 1 to flex freely , free from any rigidity imparted by the presence of the shank of a fishing hook 10 in the through - bore 5 . in the illustrated embodiment , the upper and lower body portions a and b are separate mouldings . the upper body portion a is moulded with a protruding plug 9 of pear - shaped cross - section as shown in fig7 and the lower body portion b has a correspondingly shaped socket 12 which receives the plug 9 to lock the two body portions a and b together . the socket 12 is positioned just behind the head of the simulated fish which head is part of the lower body portion . this allows the upper body portion a to flex along its entire length rearwardly from its point of contact with the lower body portion . the plug 9 crosses the path of the through - bore 5 in the lower body portion b and so it is provided with a corresponding through - bore to allow the passage of the line 11 to the eye of the fish hook . to protect the plug 9 against abrasion from the fish hook 10 or line 11 , a small tube 6 of relatively harder material is inserted or moulded into the through - bore in the plug 9 . it is intended that the eye of the hook should be situated on the tail side of the tube 6 , and accordingly the line from the fish hook also serves as a locking member to retain the plug 9 in its socket 12 in the lower body portion b . the tube 6 is also of larger diameter than the through - bore 5 , so that in the embodiment illustrated , where both body portions a and b are moulded from a soft flexible plastics material , the tube 6 is prevented from being pulled through the soft material of the lower body portion b when acting as a stop against which the eye of the hook bears . in a two part fish lure as shown in fig1 to 9 , it is also possible to mould the upper body portion a in a flexible material and the lower body portion b in a relatively rigid material . in the embodiment shown in the drawings , the flexibility of the upper body portion is increased by slots 3 which extend from the longitudinal slot 2 upwards along the outside surface of the upper body portion . these are cut along the natural rib line of the simulated sand - eel in sufficient numbers to give the required flexibility . attached to the tail end of the upper body portion a is a spoon - shaped baffle plate 13 which is normal to a vertical plane through the line f -- f shown in fig2 . the plate 13 is given a very acute positive angle to the vertical and is attached for approximately one - third of its length to the top of the tail section 1 of the upper body portion a . when the fishing lure is drawn through the water , the action of the water on the spoon - shaped baffle 13 imparts a life - like wriggling action to the flexible upper body and tail portion a . to prevent the upper body portion a lifting away from the body portion b under the action of water on the baffle plate 13 and thus opening the slot 2 in an unnatural manner , the upper body portion a is provided with fins 4 placed at a negative angle to the vertical and positioned near the open end of the slot 2 . the action of the water on the fins 4 as the lure is drawn through the water tends to push the upper body portion a towards the lower body portion b and to close the slot 2 . this inhibits vertical flexing of the upper body portion a , so that the natural sideways flexing action caused by the baffle 1 is favoured . the upper and lower body portions a and b may also be joined adjacent the rear end of the slot 2 by a bridge portion spanning the slot 2 . in this case , of course , the two body portions are not entirely separate but it has been found that the bridge portion prevents separation of the two body portions a and b also prevents the line 11 passing up the rear of the slot 2 in use and becoming entangled with the lure . further fins 7 and 8 may be added to the fish body for naturalistic effect , to stabilise the motion of the lure through the water , and to cause it to descend without the use of large weights on the line . fig9 and 10 show a fishing lure according to the invention which is a simulated pilchard . this lure is moulded in one piece and the longitudinal slot 2 extending towards the head of the lure is provided during moulding . as before , the slot 2 divides the fish body into an upper body portion which includes the flexible tail portion and a lower body portion which is apertured to receive a fish hook . again , a spoon - shaped baffle 13 is positioned at the tail end of the upper body portion to impart a wriggling action to the upper body portion when the lure is drawn through the water , and the flexibility of the upper body portion is increased by a further slot 3 , or slots as required , extending from the longitudinal slot 2 into the upper body portion . fins 4 , 7 and 8 have the same action as those described for the sand - eel embodiment .
a fishing lure is split horizontally to provide an upper body portion and a lower body portion , so that the upper body portion which carries the tail portion may flex freely without the rigidifying effect of the shank of the hook mounted in the lower body portion .