On sott.com you will find a lot of information about the reason
why fish that live in the deep sea, tend to appear in fishermen's nets more frequently. For the angler who has been fishing in the same area for many years and seeing only the same type of species, yes, it will certainly seem strange to see something "new/odd".
The species found in and around Belize, is the Short-Nosed Batfish, but there are about 60 species of fishes of the family Ogcocephalidae (order Lophiiformes), found in warm and temperate seas; of which the Short-Nosed Batfish is a member.
Typically, bat fish dwell on the bottom of the ocean floor. So this was a rare find indeed. They are found in deep, lightless waters of the Atlantic, Indian and western Pacific Oceans. They are bottom-dwelling fishes, mostly found on the continential slope at depths between 660 feet and 3,300 feet deep. Found singly on mud, rubble and sandy bottoms resting on the sand or partially covered in sand or mud close to reef edges. They feed on algae, fish, invertebrates and worms.
Everything you need to know about Bat Fish in Belize.
www.belizebudgetsuites.com
The one in your photo looks like a younger version, because of the length of the legs compared to this photo.
The alien-looking creature has been compared to "something out of a sci-fi horror film" by islanders
www.mirror.co.uk