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REP: The Seahogs — Description
The seahogs are marine, ground-dwelling worms that are primarily saprophages. Fat-bodied, with a length up to 40 cm and a weight of several kilograms, the seahogs might look like an easy meal, but almost all of them are noxious to toxic, warning their would-be predators with bright colouration, while the species living in deep waters or buried warn with a foul smell. Their toxins can be released into the water through glands on their backs. Most species feed on sediment, a few exceptions are filterfeeders or devour sessile organisms. Seahogs have no jaws and have to swallow their food whole. To mate, they aggregate at certain times of the year and release their gametes into the water. The transparent larvae are only mildly toxic and are capable of swimming.

Feathertongued hogworm: A filterfeeding species where the sensory tentacles of the upper lip developed into filtering organs. Feathertongued hogworms are usually buried in the sediment with only their tentacles sticking out, with each of them regularly being retracted into the mouth to be licked clean. They can be found anywhere, as long as there is enough water current that transports enough food particles, which doesn't have to be much due to the feathertongues having a slow metabolism.
Small sticklehog: Additionally to being poisonous, sticklehogs are also covered in small silicate spines, with especially large spines next to the gland openings. The spines are porose and easily break off, causing nasty infections. Sticklehogs are generally small species that live in shallow water.
Sweeping combcarrier: Additionally to the internal gills that are connected to the intestine, the combcarriers possess outgrowths close to their glands which work as external gills. Combcarriers inhabit waters with lower oxygen concentrations, being particularly diverse in the tropics and sometimes living close to anoxic zones, where they can feed on washed-out remains of the sulphozoans.
Hogworm: THe hogworms are elongated and either live in the sediment or in rocky areas, where they crawl between the rock crevices in search for food. Some of them are active predators or rasp sessile organisms off hard substrates; for this, they evolved an evertible gullet that is covered with small teeth. Due to their more crypti lifestyle, hogworms are among the least-toxic seahogs, often lacking the aposematic colouration and going for camouflage instead.