HORIZON SCANNING SPECIES LISTS Name of presenter

Horizon Scanning Species Lists These species are not known to be in the UK but are thought to be at risk of arrival. Species known to be in the UK are in a separate presentation.

All Horizon Scanning Species HORIZON SCAN SPECIES IMPACT ON   SPECIES NAME COMMON NAME IMAGE Ports/ harbours Shipping Fishing (commercial) Recreational boating Water sports Sports fishing Angling Diving Aquaculture Mariculture Tourism Natural Environment IMPACT NOTES Megabalanus coccopoma Titan acorn barnacle Megabalanus coccopoma Marco Faasse (CC) BY-NC-SA 4. Y Fouling of boats, ships, buoys, and other man-made structures, aquaculture ropes and floats used in oyster and mussel culture. Rapid growth and large size. Can replace other species. Ocinebrellus inornatus Japanese oyster drill Ocinebrellus inornatus G & PH Poppe Predator of bivalves. Serious threat to oysters. Paralithodes camtschaticus Red king crab Paralithodes 2 Lis Lindal Jørgensen, IMR, Norway N Especially during mass developments, the crab has an enormous predatory impact on local species. The nature of the food consumed varies per life stage. The pelagic larvae consume both phytoplankton and zooplankton and once settled feed on hydroids. Adult crabs prey upon a large variety of species. Crabs in the by-catch of local fishermen cause concern as they damage fishing gear in gillnet, longline and trap fisheries. Celtodoryx ciocalyptoides Cauliflower sponge Celtodoryx J Bishop Grows in large extensive patches smothering. Grows on the BAP species the Pink sea fan. Asterias amurensis Flatbottom sea star/ Northern Pacific seastar Asterias amurensis Lycoo (CC) BY-NC-SA 4.0 The seastar is considered a serious pest of native marine organisms, it establish large populations in new areas, is a voracious feeder, preferring mussels, scallops and clams but will eat almost anything it can find, including fish eggs, sea squirts, dead fish and fish waste. The seastar is also considered a mariculture pest, settling on scallop longlines, spat bags, mussel and oyster lines and salmon cages. In Japan seastar outbreaks cost the mariculture industry millions of dollars. Pseudochattonella verruculosa A planktonic alga Pseudochattonella verruculosa Cawthron Institute A toxic phytoplankton which can cause red tides killing fish and other organisms e.g. whales. Can cause shellfish farm and beach closures. Another similar species causes Paralytic Shellfish Poisoning. Table generated for The RAPID LIFE Project by Chris Wood, Bishop Group, Marine Biological Association

Titan acorn barnacle, Megabalanus coccopoma Image courtesy of Marco Faasse (CC) BY-NC-SA 4.

Japanese oyster drill, Ocinebrellus inornatus Image © G & PH Poppe

Red king crab, Paralithodes camtschaticus Image © Lis Lindal Jørgensen, IMR, Norway Image courtesy of The Children’s Museum of Indianapolis (CC) BY-SA 3.0

Cauliflower sponge, Celtodoryx ciocalyptoides Image © J Bishop, MBA Image © J Bishop, MBA

Flatbottom sea star/ Northern Pacific seastar, Asterias amurensis Image courtesy of Lycoo (CC) BY-NC-SA 4.0

A planktonic alga, Pseudochattonella verruculosa Image © Cawthron Institute