referring to the drawings in detail wherein like elements are indicated by like numerals , there is shown in fig1 a typical fishing boat 10 with the invention 1 attached thereto . the boat 10 has a bow 11 , stern 12 , two curves sides 13 , an exterior 27 , an interior 28 containing a front deck 14 and a rear deck 15 , a cabin 24 separating the front deck 14 and the rear deck 15 , gunnels 16 formed on the portion of the sides 13 defining the rear deck 15 , and a transom 17 formed on the boat stern 12 . fishing boats come in many shapes , sizes and configurations . the boat 10 shown in this application is meant to show a generalized fishing boat for purposes of illustration and is not meant to limit the invention to a boat of this particular configuration . the invention 1 is adapted to being attached across either the boat transom 17 or one of the gunnels 16 . the invention 1 is comprised canvas bag - like container 30 forming a tank for holding a large fish 4 . the container is made from rugged , water - impervious material , such as canvas . insulation 25 is also provided within the container interior 38 . the container 30 is further adapted to holding brine 2 and ice 3 around the fish 4 within the container 30 . the container 30 has a front 31 , rear 32 , left side 33 , right side 34 , bottom 35 , top 36 , exterior 37 and interior 38 . the sides 33 , 34 define the longitudinal axis of the container 30 . in this embodiment of the invention 1 the container 30 has a side 33 to side 34 length of ninety - nine inches which is just short of the nominal gunnel 16 to gunnel 16 width of most fishing boats 10 near to the stern 12 , i . e ., approximately one hundred two inches . the sides 33 , 34 rise from the bottom 35 to the bag top 36 and interconnect the front 31 with the rear 32 . the sides 33 , 34 , bottom 35 , top 36 , front 31 and rear 32 define the container interior 38 . an elongated first flap 40 is fixedly attached to the container 30 along a junction 39 formed by the container rear 32 and top 36 , said first flap 40 extending from one container side 33 to the other container side 34 . the first flap 40 has a front edge 41 attached along its length to the junction 39 , an opposite rear unattached edge 42 , two opposite sides 43 , an upper surface 44 and a lower surface 45 . the longitudinal axis of the first flap 40 is defined by the two sides 43 . a number of fasteners 46 are fixedly attached to the flap near to the rear unattached edge 42 . a corresponding number of fasteners 47 are attached to the stern exterior 18 just below the transom 17 . alternatively , or in addition to the stern fasteners 47 , a corresponding number of fasteners 47 may be attached to either or both boat side exteriors 19 just below the gunnels 16 . the container 30 is adapted to being attached to the boat 10 by means of the first flap 40 . the container bottom 35 sits on the rear deck 15 with the container rear 32 against either the stern 12 or one of the boat sides 13 . the first flap 40 is positioned over either the transom 17 or one of the boat gunnels 16 . the flap fasteners 46 are joined to the boat fasteners 47 , thereby securing the container 30 to the boat 10 . the container 30 has an elongated fastener 50 across the junction 39 and continuing across the top 20 and front 21 of each container side 33 , 34 . in this embodiment of the invention , the fastener 50 is a zipper . the zipper 50 has a permanent elongated row 51 across the container rear 32 at the junction 39 and continuing across the top 20 and front 21 of each container side 33 , 34 . the zipper permanent elongated row 51 mates with one of a plurality of opposite zipper rows 52 attached to the container top 36 . in this embodiment of the invention there are four opposite zipper rows 52 . the first opposite zipper row 52 is attached to the container top 36 at the junction 39 and continuing along each the top adjacent to each side 33 , 34 and continuing down the container front adjacent to each side 33 , 34 . the remaining opposite rows 52 &# 39 ; are parallel and equispaced to each other and run from container side 33 to container side 34 . the selection of a different opposite zipper row 52 or 52 &# 39 ; for mating with the permanent zipper row 51 permits adjustment of a container interior front 31 to rear 32 cross section 8 . the interior 38 of the container 30 is water proof and insulated . at the seventy - three inch mark moving from the container left side 33 toward the container right side 34 , a loose second flap 60 is attached to the container interior 38 . the interior second flap 60 is made from a water - impervious material . the interior second flap 60 is attached to the container interior 38 along a front 31 to rear 32 cross section seam 55 perpendicular to the container longitudinal axis . the interior second flap 60 is attached along the seam 55 to the front 31 , bottom 35 and rear 32 . the attachment seam 55 is water tight . the interior second flap 60 has a generally rectangular shape with two opposite short sides 62 and two opposite long sides 63 . the interior flap short sides 62 are initially positioned parallel to the container sides 33 , 34 . the interior flap long sides 63 are initially positioned parallel to the container front 31 and rear 32 . the interior second flap 60 is joined to the attachment seam 55 along an interior flap line 64 parallel to the interior flap short sides 62 . that portion of the interior flap between the flap short side 62 and flap attachment line 64 toward the container left side is designated the flap floor portion 65 . that portion of the interior flap between the flap short side 62 and the flap attachment line 64 toward the container right side is designated the flap wall portion 66 . a plurality of eyelets 67 are attached to the interior second flap 60 near to the flap wall portion short side 62 . a rope 68 is threaded through the eyelets 67 . when a fish 4 is placed into the container interior 38 , the fish 4 is positioned so that its tail 5 is against the container left side 33 and its head 6 is toward the container right side 34 . the fish 4 will rest on the container bottom 35 and will lie , in part , on the interior flap floor portion 65 . since the fish 4 will generally have a length of between seventy - three inches and ninety - nine inches , the interior flap wall portion 66 is adapted to changing the size of the container interior 38 to accommodate the longitudinal size , i . e ., head to tail , of the fish 4 . the rope 68 threaded through the interior flap eyelets 67 is drawn vertically upward away from the container bottom 35 through the container top 36 . the rope 68 is then drawn over the fish head 6 toward the container left side 33 . this action causes the interior flap wall portion 66 to move over the fish head 6 to the fish gill plate 7 . the rope 68 is then passed through one or two holes 22 in the left side wall 33 and tied to a boat cleat 9 . adjustment for the diameter of the fish 4 may be made by choosing the appropriate opposite zipper row 52 or 52 &# 39 ; for mating with the zipper permanent row 51 . before the rope 68 is tied to the cleat 9 and the zipper 50 is closed , brine 2 and ice 3 are packed around the fish 4 . to better hold the fish 4 in place , especially during rough seas , the container front 31 may be shaped so that the tail 5 of the fish 4 can be used to help lock the fish 4 to the container left side 33 . this may be done by means of a simple vertical indentation 23 in the container front 31 near to the container left side 33 . it is understood that the above - described embodiment is merely illustrative of the application . the bag can be set up to be left or right handed . other embodiments may be readily devised by those skilled in the art which will embody the principles of the invention and fall within the spirit and scope thereof .
an insulated , flexible , canvas container which attaches to a boat when in use . the bag has several parallel , longitudinal fasteners for closing the bag thereby providing means for adjusting the size of the bag to fish of various diameters . the bag has an internal flap which provides a means for shortening the length of the bag . the bag is made from rugged , water - impervious material .