Doesnt look like bad ground! Get any fish off it?
Cheers

May be bait? May also be weed?  How is the book helping?

Got 2 pink snapper 65cm and 77cm

still reading the book over and over again 

 Wouldn't worry about activating fish symbol

2nd photo 3m arches look very much like pinkies do

 Balls on the bottom similar to 3rd photo dhuies , a straight line similar to the arches but thinner and straighter generally about 50ft are sharks

 lol sharks eh  they must be the new models that come with a swim bladder. Looks like good ground lots of tails 

Yep just like weed and ground now have swim bladders

But seriously yes can pick a shark every time 

 Yeah i thought that as well mate but on doing a bit of research consensus was that they rarely show up on a sounder .Maybe some of the gurus on here can throw a bit of light on the subject.

faq.airmar.com/index.php

 May be because it's on 3D?

 Any matter object will show up as it will even if it weakens /asorbs some of the sound echo will still return an echo hence the density colour differences 

As said before can pick up a shark

 point taken  did a bit more reading on it and yeah apparently you will get a reading but not as good a reading as a fish with a swim bladder will. Not familiar with the lowrance set up as i have a furuno been using it for years caught heaps of fish and still find it hard to call what particular fish is showing  just that if you get a solid reading my sounder will show either yellow or dark red and it's off the bottom then it's going to be decent. As the fellas said above keep comparing the book shots to yr shots   clear as mud eh lol

 it doesn't need a swim bladder to be picked upon a sounder. Basic misconception. if it will bounce an echo, it will give a return.

 My lead sinkers, craypots and crab nets dont have swim bladders but i see their echo descending on the sounder.

 So what would you reckon would have the better reading between a large fish and a shark around the same size given one has a swim bladder and the other doesn't, i thought that the bladder helped give a better read. Got me curious now need to get it confirmed as the fellas rnd the bar last night couldn't agree lol.

 Willo from memory your south wards I'm bunbury happy to take you out and show you or vice versa other wise I'll try and take screen shots and pm you to show the different species, haven't really bothered taking photos but if your willing to learn can show

 no probs mate I'm in bunno as well always keen to learn, good to fish with different crew we could probably teach each other a few things. Just out of curiosity what sounder do you use. And yeah pm me when you head out next and need a deckie will make a change for me as I'm always the skipper lol.

 But home at the moment Sundays looking good

FCV 620 

Also run the LSS2 on the simrad but still learning that one  , mainly use the furuno