Dear Ante,
I would say that the first two are Nereididae (on the second photo you can see the pharynx expelled), next two are Ophellidae, and the last two are Nereididae as well.
Barbara
I agree with the Nereididae, and the other two are most likely Ophellidae. However, it looks like you have incomplete worms with part of the head missing. The photos are not that great, however, so I could be wrong.
1, 2 and 5, 6 are nereidid polychaete worm, same species, if you collected it on hard bottom in the Med or eastern Atlantic, it seems to be Platynereis dumerilii, characteristic with long peristomial tentacles, though paragnats should be checked. Specimen in fig 3 and and 4 belong to Opheliidae and most probably Polyophthalmus pictus, a common hard-bottom species in the Med.
I agree, those are the genera Ceratonereis and Polyophtalmus, however I don´t know what species they are, where are they from?
The specimens are from the algae bed (1 m depth) in south Adriatic sea, near Split, Croatia.
I agree too.
The specimens 1, 2, 5 and 6 belong to the Nereididae family (4 eyes, 2 antennas, 2 labial palps, numerous peristomial cirris, jaws on the proboscis and normally 2 caudal cirris on the pygidium) and the specimens 3 and 4 belong to The Opheliidae family (a white proboscis which looks like a flower, a ventral gutter and a pygidium with a flower form two).
Wish you the best!
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