1. The Bathyal environment is intermediate between the neritic environment and the abyss.

2. 21 There were mainly neritic shelf and bathyal filling sedimentation in the Pliocene and Quaternary.

3. The hydroid fauna of the mid-abyssal zone may be sparse compared with that of neritic waters, but it is less frequently sampled and remains poorly known.

4. Question: Benthonic organisms have their largest and most diverse populations in which zone? a) neritic zone b) abyssal zone c) littoral zone d) bathyal zone e) supratidal zone

5. En Interactions between the shelf and the various components of the coastal zone (neritic zone, estuaries, inter-tidal zone, lagoons and salt marshes); relative importance of autochthonous and Allochthonous sources of matter for different types of near-shore ecosystems; origin, transformation and fate of organic matter in the coastal sea