Figure 4. Representative seabed photographs from Whittard Canyon.

A Large colonies of Lophelia pertusa at the main coral wall site D13 (1350 mwd), plus associated fauna including the large bivalve Acesta, several species of gorgonians, crinoids and hydroids. The fauna preferentially colonise the more resistant beds. B Detail of Caryophylla sp. at D13. C Coral growth on a vertical cliff in the western canyon branch, at site D02, ca. 1600 mwd. The main species are Primnoa sp. (large light pink colony, lower left) and Lophelia pertusa (small dark pink colony and larger brown colony, upper right). The substratum most probably consists of Cretaceous or Paleocene chalk, which is softer than the substratum at D13, and prone to burrowing and flaking. Note flakes of eroded rock on top of two separate coral colonies. D Trawl marks at ca. 550 mwd at dive site D01. E A Basket star (Brisingid sp.) and corals entangled in a lost longline at dive site D02.