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Sea Slug Photos

Here is a collection of Sea Slug photo resources, most of which include scientific and associated common names and often some brief notes with them.
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Anderson Sea Slug
Keoki and Yukos' photo of a Anderson Sea Slug (Hypselodoris andersoni), taken at 25' in Shark's Cove, Oahu.

Bertsch's Sea Slug
Keoki and Yukos' photo of a Bertsch's Sea Slug (Hypselodoris bertschi) taken at 20' at Makapu'u, Oahu.

Black Dendrodoris Sea Slug
Keoki and Yukos' photo of a Black Dendrodoris Sea Slug (Dendrodoris nigra) which is common under rocks in shallow water, is black with tiny white speckles and grows to about 2 inches long.

Blackmargin Sea Slug
Keoki and Yukos' photo of the Blackmargin Sea Slug (Glossodoris atromarginata) which was found on large black sponge (Spongia oceania0 at Makapu`u, Oahu. It is about 2 inches long. This is a common Indo-Pacific species first recorded in Hawaii in 1995.

Blue Dragon Sea Slug
Keoki and Yukos' photo of a Blue Dragon Sea Slug (Pteraeolidia ianthina) which is common on hydroid-encrusted walls and wrecks and appears lilac to purple at depth. Attains 5 inches.

Blue Dragon Sea Slug
Keoki and Yukos' photo of a Blue Dragon Sea Slug (Pteraeolidia ianthina) which is common on hydroid-encrusted walls and wrecks and appears lilac to purple at depth. Attains 5 inches.

Blue Swallowtail Sea Slug
Keoki & Yuko Stenders' photo of the Blue Swallowtail Sea Slug (Chelidonura hirundina) which is black with blue and yellow lines, is common on shallow reefs. This Sea Slug feeds upon flatworms and is about 1 inch long.

Blue-Spotted Swallowtail Sea Slug
Keoki & Yuko Stenders' photo of the Blue-Spotted Swallowtail Sea Slug (Chelidonura sp.).

Clumpy Sea Slug
Yuko's photo of a Clumpy Sea Slug (Asteronotus cespitosus), which is uncommon in shallow water and attains 5 inches in length.

Cup Coral Eating Sea Slug
Keoki and Yukos' photo of the Cup Coral Eating Sea Slug (Phestilla melanobranchia), taken at 20' in the Haleiwa Trench, Oahu.

Decorated Sea Slug
Keoki & Yuko Stenders' photo of the Decorated Sea Slug (Chromodoris decora) which is uncommon on sponge-encrusted surfaces at scuba depths and attains a length of about 1 inch long.

Fellow's Sea Slug
Keoki and Yukos' photo of a Fellow's Sea Slug (Peltodoris fellowsi), taken at 20' in Shark's Cove, Oahu.

Fissured Sea Slug
Keoki and Yukos' photo of a Fissured Sea Slug (Phyllidiopsis fissuratus), taken at 45' in Shark's Cove, Oahu.

Fried-Egg Sea Slug
Keoki and Yukos' photo of a Fried-Egg Sea Slug (Phyllidia varicosa), taken at 40' in Shark's Cove, Oahu.

Gold Lace Sea Slug
Keoki and Yukos' photo of a Gold Lace Sea Slug (Halgerda terramtuentis), taken at 30' in the Haleiwa Trench, Oahu.

Hairy Sap-Sucking Sea Slug
Keoki and Yukos' photo of the Hairy Sap-Sucking Sea Slug (Elysia sp.cf. tomentosa). This Sea Slug is rare but found in shallow water with green algae (Caulerpa taxifolia), which it stores algal cells within body for photosynthesis. This Sea Slug has a leathery body with fuzzy papillae. New record from Hawaii.

Hairy Sap-Sucking Sea Slug
Keoki and Yukos' close up photo of the Hairy Sap-Sucking Sea Slug (Elysia sp.cf. tomentosa). This Sea Slug is rare but found in shallow water with green algae (Caulerpa taxifolia), which it stores algal cells within body for photosynthesis. This Sea Slug has a leathery body with fuzzy papillae. New record from Hawaii.

Imperial Sea Slug
Keoki and Yukos' photo of an Imperial Sea Slug (Risbecia imperialis). Pairs are sometimes common at scuba depths. Usually 2-3 inches long.

Indian Sea Slug
Keoki & Yuko Stenders' photo of an Indian Sea Slug (Caloria indica) which is commonly found on vertical walls and wrecks where it feeds upon hydroids and stores nematocysts in white-tipped cerata. It is about 1 inch long.

Indian Sea Slug
Keoki & Yuko Stenders' photo of an Indian Sea Slug (Caloria indica) which is commonly found on vertical walls and wrecks where it feeds upon hydroids and stores nematocysts in white-tipped cerata. It is about 1 inch long.

Kahuna Sea Slug
Keoki and Yukos' photo of the beautiful Kahuna Sea Slug (Thorunna kahuna) which is rare on shallow silty ledges and has a translucent pink body with purple rim and white mantle glands fore and aft. Thorunna daniellae has a white body. Gills wriggle as it crawls. Less than 1 inch long. Endemic to Hawaii.

Magenta-Striped Sea Slug
Keoki and Yukos' photo of a Magenta-Striped Sea Slug (Hypselodoris maridadalus) taken at 10' in Midway Harbor.

Man-O-War Sea Slug
Keoki and Yukos' outstanding photo of the Man-O-War Sea Slug (Glaucus atlanticus). This photo was taken at Kualoa, on Oahu.

Midway Sea Slug
Keoki and Yukos' photo of a Midway Sea Slug (Hypselodoris insulana) taken at 15' in Midway Harbor.

Orange Gumdrop Sea Slug
Keoki & Yukos' photo of the Orange Gumdrop Sea Slug (Berthellina citrina) which is common on reefs at night and attains 2 inches in length.

Orange Sidegill Sea Slug
Keoki and Yukos' photo of an Orange Sidegill Sea Slug (Pleurobranchus sp.cf. peroni) which is uncommon under rocks in shallow water and tidepools. Rusty orange with closely packed tubercles. About 1.5 inches.

Ornate Sap-Sucking Sea Slug
Keoki and Yukos' photo of the Ornate Sap-Sucking Sea Slug (Elysia ornata) which is seasonally common in shallow water with green algae (Bryopsis). This Sea Slug stores algal cells within its body for photosynthesis. Their black & white spots vary in size. Attains 2 inches.

Painted Sea Slug
Keoki and Yukos' photo of a Painted Sea Slug (Hypselodoris infucata), taken at 35' on the Kaneohe Sand Bar, Oahu.

Red Dendrodoris Sea Slug
Keoki and Yukos' photo of the Red Dendrodoris Sea Slug (Dendrodoris rubra) which is uncommon in caverns with heavy sponge growth and attains 3 inches.

Red Sidegill Sea Slug
Keoki and Yukos' photo of a Red Sidegill Sea Slug (Pleurobranchus grandis), a large white slug with ruby-red compound tubercles which is uncommonly found on ledges in silty areas at scuba depths. It reaches at least 8 inches.

Reticulated Red Sea Slug
Keoki and Yukos' stunning photo of a Reticulated Red Sea Slug (Chromodoris sp.cf. tinctoria) whose red & yellow markings vary among individuals. This may be a new species which is uncommon at scuba depths, but is the most common slug at Midway. About 2 inches long.

Ringed Sap-Sucking Sea Slug
Keoki and Yukos' photo of a Ringed Sap-Sucking Sea Slug (Plakobranchus ocellatus), taken at 10' in Midway Harbor.

Scott Johnson's Sea Slug
Keoki and Yukos' photo of a Scott Johnson's Sea Slug (Phyllidia scottjohnsoni), taken at 50' off Midway.

Thrownet Sea Slug
Keoki and Yukos' photo of a Thrownet Sea Slug (Melibe pilosa) which is fairly common on brown seaweed in shallow water during winter but difficult to see. Broad oral hood is used to engulf small crustaceans. Several species are found in Hawaii but rarely seen. Reaches 3 inches.

Tom Smith's Sea Slug
Keoki and Yukos' photo of a Tom Smith's Sea Slug (Glossodoris tomsmithi), which was taken at 25' in Shark's Cove, Oahu.

Trembling Sea Slug
Keoki and Yukos' photo of a Trembling Sea Slug (Hypselodoris vibrata) taken at 10' at the Cargo Pier, Midway.

Warty Sea Slug
Keoki and Yukos' photo of a really weird looking Warty Sea Slug (Dendrodoris tuberculosa) whose color is ranges from tan to gray and is uncommonly found in shallow water and attains at least 6 inches in length.

White-Margin Sea Slug
Keoki and Yukos' photo of a White-Margin Sea Slug (Glossodoris rufomarginata), taken at 20' at Sharkfin, Lana'i.

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