http://www.amazon.com/FLIR-ONE-Thermal-Imager-iPhone/dp/B00K0PXFB6/ref=sr_1_1?ie=UTF8&qid=1416781507&sr=8-1&keywords=flir+thermal
Might work at night in lobster pots for those of you in Maine.
Looks more secure than the $200 model which is "attached".