Great image of humpback on the sounder
Submitted by southcity104 on Wed, 2011-04-27 09:23
I thought this pic was worth posting. Its a humpback. Taken on a raymarine sounder. Pretty special image recieved on the sounder i thought.
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grayzeee
Posts: 2283
Date Joined: 09/07/09
thats cool. some say the
thats cool.
some say the image you get as a return from the fish is from the swim bladder , but that suggests otherwise
If I spent half as long fishing , as I do reading this bloody forum , I'd be twice the fisherman I am.
Tony Halliday
Posts: 2500
Date Joined: 14/06/07
not true mate, even jelly
not true mate, even jelly fish show up on sounders,
The echo return is dependent on density reflecting the sound waves back and as Holk says, they can show the density gradient. You get a picture of the density in the water, where clear is water and anything denser or lighter will come up as an image.
with most fish the biggest density difference is between the flesh and fish bladder and thats why it stands out most. BUT some good sounders will show the whole body lenght if it's a big and dense muscle fish. or a dense spinal collumb as well will show up. This whale pic would show the huger back bone and fins as well as the huge jaw and tail strcuture.
I have seen images of divers on sounders before and even picked up my own bait sinking away and jigs on the sounder.
Tony Halliday: ~Meals on Reels ~
It takes a strong fish to swim against the current. Even a dead one can float with it
"It is always in season for old men to learn." Aeschylus (525-456 BC)
"In a mad world only the mad are sane." Akira Kurosawa (1910-1998)
grayzeee
Posts: 2283
Date Joined: 09/07/09
er.. i think you're in
er.. i think you're in agreement with me then tony , unless i've misunderstood.
i was saying i didn't think you needed a swim bladder to get a return . and being able to watch a jig or weight heading to the bottom on your sounder ought to prove it.
If I spent half as long fishing , as I do reading this bloody forum , I'd be twice the fisherman I am.
Tony Halliday
Posts: 2500
Date Joined: 14/06/07
lo.l yes brain still on
lo.l yes brain still on holiday...lol I am in agreement
Tony Halliday: ~Meals on Reels ~
It takes a strong fish to swim against the current. Even a dead one can float with it
"It is always in season for old men to learn." Aeschylus (525-456 BC)
"In a mad world only the mad are sane." Akira Kurosawa (1910-1998)
Bill
Posts: 437
Date Joined: 24/03/07
LOL....yeah and the thick red
LOL....yeah and the thick red line on the surface is cryll.
I can also see the skippy swimming under it!...lol
Lamby
Posts: 3145
Date Joined: 04/08/09
that is a sweet shot
that is a sweet shot
hlokk
Posts: 4293
Date Joined: 04/04/08
Pretty amazing image. Was the
Pretty amazing image. Was the boat moving over the whale or the whale moving under the boat?
Grayzee- the sounders pick up changes in density, and a swim bladder is a huge change in density, so is the easiest thing for a sounder to pick up. For the whale, i assume either the whale either has flesh a bit less penetrable to sonar than fish, or just the fact its so big, it still comes up on the sounder. Keep in mind most sounders still pick up weed for example. I think with fish you'd still get reflections from the fish, just that the swim bladder is a much stronger signal?
grayzeee
Posts: 2283
Date Joined: 09/07/09
you can make out the pec
you can make out the pec fins even. (at least i think thats likely to be them over wierd shaped lungs)
If I spent half as long fishing , as I do reading this bloody forum , I'd be twice the fisherman I am.
beau
Posts: 4114
Date Joined: 24/01/10
loch ness monster
loch ness monster
southcity104
Posts: 1659
Date Joined: 27/01/09
stationary
but i think there was a fairly strong tide. 1 knot +
"Its a life style job"
Tony Halliday
Posts: 2500
Date Joined: 14/06/07
Yip I agree it was Nessie on
Yip I agree it was Nessie on her summer vaccation to Aus-land....lol
Now to send it off to 7 News and tell them we have a monster off the north,,,lol
Tony Halliday: ~Meals on Reels ~
It takes a strong fish to swim against the current. Even a dead one can float with it
"It is always in season for old men to learn." Aeschylus (525-456 BC)
"In a mad world only the mad are sane." Akira Kurosawa (1910-1998)
Goodz
Posts: 2332
Date Joined: 20/07/09
That one musta gone close!
That one musta gone close! Not sure if you saw this one of mine before... not quite as clear but still pretty cool I thought.
grayzeee
Posts: 2283
Date Joined: 09/07/09
ha. awesome shot too.
ha. awesome shot too.
If I spent half as long fishing , as I do reading this bloody forum , I'd be twice the fisherman I am.