APHOTOMARINE

An educational resource dedicated mainly to the photography
and diversity of marine life that can be found in coastal waters
and intertidal areas of Great Britain and Ireland.

A-P-H-O-T-O Wildlife Stock Image Library
Perophora japonica Oka, 1927 - Creeping sea squirt, an alien invader (Tunicate images)
This non-native invasive species has since Sept. 2017 been found in North Devon. Please e-mail records and images to APHOTOMARINE so the species can be tracked in the Bristol Channel.

Creeping sea squirt
Perophora japonica
- zooids and terminal buds 1

Creeping sea squirt
Perophora japonica
- zooids and terminal buds 2

Creeping sea squirt
Perophora japonica
- habitat 1

Specimen above found at Baulk Head, Gunwalloe Fishing Cove, near Helston, Cornwall, 06.07.16. The species was found growing all over Baulk Cove frequenting dark overhangs that never get sunlight and rock crevices on the tide level of a low spring tide.

Creeping sea squirt
Perophora japonica
- zooid lateral view 1

Creeping sea squirt
Perophora japonica
- zooids attached to algae 1

Creeping sea squirt
Perophora japonica
- zooids attached to algae 2

Creeping sea squirt
Perophora japonica
- zooids attached to algae 3

Creeping sea squirt
Perophora japonica
- zooids dorsal view 1

Specimens above found in a pool on the lowershore on a reef south of Fistral Beach, Newquay, Cornwall. 16.10.15.

Creeping sea squirt
Perophora japonica
- on panel board Falmouth 1

Specimen above found on panel boards at Port Pendennis Marina, Falmouth, Cornwall. 30.06.15.

Creeping sea squirt
Perophora japonica
- on pontoon at Helford 1

Creeping sea squirt
Perophora japonica
- on pontoon at Helford 2

Specimen above found at the end of a pontoon at Helford Yacht Club, Helford, Cornwall, 29.10.15.

Creeping sea squirt
Perophora japonica
- zooid lateral view 2

Creeping sea squirt
Perophora japonica
- throwing star terminal bud 1

Creeping sea squirt
Perophora japonica
- throwing star terminal bud 2

Creeping sea squirt
Perophora japonica
- throwing star terminal bud 3

Creeping sea squirt
Perophora japonica
- throwing star terminal buds 1

Creeping sea squirt
Perophora japonica
- throwing star terminal buds 2

Creeping sea squirt
Perophora japonica
- throwing star terminal buds 3

Creeping sea squirt
Perophora japonica
- zooids lateral view 1

Creeping sea squirt
Perophora japonica
- zooids lateral view 2

Creeping sea squirt
Perophora japonica
- zooids lateral view 3

Creeping sea squirt
Perophora japonica
- zooid lateral view 3

Creeping sea squirt
Perophora japonica
- zooid lateral view 4

Creeping sea squirt
Perophora japonica
- zooid siphon / top view 1

Creeping sea squirt
Perophora japonica
- juvenile zooids 1

Creeping sea squirt
Perophora japonica
- juvenile zooids 2

Creeping sea squirt
Perophora japonica
- juvenile zooids 3

Creeping sea squirt
Perophora japonica
- zooids / colony under rock 1

Creeping sea squirt
Perophora japonica
- zooids / colony under rock 2

Creeping sea squirt
Perophora japonica
- zooids / colony under rock 3

Creeping sea squirt
Perophora japonica
- zooids / colony under rock 4

Creeping sea squirt
Perophora japonica
- zooids / colony under rock 5

Creeping sea squirt
Perophora japonica
- zooids / colony under rock 6

Creeping sea squirt
Perophora japonica
- zooids / colony under rock 7

Creeping sea squirt
Perophora japonica
- affected shoreline at St. Ives 1

Creeping sea squirt
Perophora japonica
- affected shoreline at St. Ives 2

Creeping sea squirt
Perophora japonica
- affected shoreline at St. Ives 3

Species found under and on the sides of rocks and stones, in crevices and on algae and bryozoans, on the lowershore, on a spit of shore to the north of Smeaton's Pier, St. Ives, Cornwall. 24.09.14.

Species also found on algae, overhanging a lowershore pool, near Godrevy Point, Gwithian, Cornwal. 27.09.14.

Creeping sea squirt
Perophora japonica
- in gullies at low tide level 1

Creeping sea squirt
Perophora japonica
- in gullies at low tide level 2

Creeping sea squirt
Perophora japonica
- in gullies at low tide level 3

Species found in gullies at low spring tide level at Barricane Beach, Woolacombe; and to the east of the bay at low spring tide level at Lee Bay near Ilfracombe, North Devon on the 19.09.17 and 20.09.17.

Creeping sea squirt
Perophora japonica
- tightly packed colony 1

Creeping sea squirt
Perophora japonica
- lozenge-shaped zooid 1

Creeping sea squirt
Perophora japonica
- throwing stars on zooids 1

Creeping sea squirt
Perophora japonica
- stolons on tunicate 1

Specimen above is of a tightly packed colony found subtidally on a spring tide at Treath, Helford, Cornwall, 08.10.17.

Thanks go to both Dr. John Bishop at the Marine Biological Association in Plymouth and Dr. Bernard Picton for help with the original identification of this species. Thanks also to Lisa Rennocks.

There should be no confusion with the sea squirt and our native Perophora listeri, due to colour, P. listeri is transparent. Perophora japonica can also be recognized by the vivid yellow 'throwing star' terminal buds that it produces. No other species of Perophora produces terminal buds like this.

APHOTOMARINE supports open source data recording and sharing for the benefit of wildlife, recorders, research, science and education. The project recommends the following websites and works with the following bodies and organisations.

Marine Biological Association MBA

The Marine Biological Association or MBA, based in Plymouth, is one of the world’s longest-running societies dedicated to promoting research into our oceans and the life they support. Since 1884 the MBA has been providing a unified, clear, independent voice on behalf of the marine biological community.It has a growing membership in over 40 countries.

CISFBR or Cornwall and Isles of Scilly Federation of Biological Recorders

The CISFBR or Cornwall and Isles of Scilly Federation of Biological Recorders is an independent umbrella organisation supporting independent recorders and recording groups in the county of Cornwall.

Cornish Biodiversity Network

The Cornish Biodiversity Network
or CBN is the largest open source wildlife database in Cornwall that sends open source data to the NBN (National Biodiversity Network). It is a new recording system based on the ERICA database, the largest recording resource in Cornwall. The CBN best supports the activities and needs of the independent recording community and recording groups in Cornwall.

NBN National Biodiversity Network

The National Biodiversity Network or NBN is a charity that supports open source data sharing and recording supporting conservation, science and education. "Why do recorders need open source?". Simply because it supports the core values of wildlife recording and the free use of records and data over a very wide network that includes partners like the Natural History Museum. The link here is to the NBN Atlas.The link here is to the NBN Atlas.

The taxonomy used here is based on that of the following database, which is also used by the MBA, NHM and the NBN.

World Register of Marine Species or WoRMS

The World Register of Marine Species or WoRMS.

Over 99% of the species records on APHOTOMARINE are open source but they are also copyright David Fenwick. Species records published on APHOTOMARINE may not be used on any database, list or distribution map, without a signed user agreement. Cornish records that appear on APHOTOMARINE are recorded using the ERICA database to benefit recording in Cornwall and scientific and historical recording in general. No financial benefit must be taken from any record produced by David Fenwick, records are of educational benefit only. Records by David Fenwick must ''never'' be financially traded.

Perophora japonica creeping Alien species invader invading yellow Sea squirt Tunicate Images
The main objective of this website is in furthering environmental awareness and education through the medium of photography. To increase awareness and access to the wildlife of the region and help
people find and identify it. Sometimes the difference between species is obvious but many species can only be determined by observing microscopic characteristics that are specific to any one species.