Icon
Photos / Sounds
Species / Taxon Name
Observer
Place
Actions

Photos / Sounds

Observer

cemills

Date

April 15, 1986

Description

A single Tethys fimbria was collected swimming at the surface of the Bay of Villefranche over deep water and brought into a large holding tank in the laboratory. After a couple of days, it laid this 14 cm long pink, spiral string of egg capsules, attached to the cement wall of the holding tank at just one end by a mucous strand. A second egg mass was not attached at all. Each capsule contained 15-20 eggs; the embryos hatched in about 10-11 days.

Photos / Sounds

Square

Observer

cemills

Date

November 2, 1981

Description

These tiny creeping jellyfish were collected in a plankton net thrown from a rocky shore and dragged in over some seaweed, where they had been living. Photographed under a microscope, the larger bell was 0.7-0.8 mm diameter. These micro-medusae live on intertidal seaweed in the surf zone and creep around on their multiple tentacle "legs".
They reproduce asexually by budding off new individuals from the central disk - note about six developing buds on the bigger specimen, with the top two now recognizable as nearly-ready to be freed new jellyfish. The central disk was a tannish golden color, with red eyespots.

Photos / Sounds

Square

Observer

cemills

Date

April 8, 1985

Description

A rare find in Friday Harbor, but this smaller and more fragile Leptomedusa masquerades as just another Clytia gregarium in the spring or early summer. There is a little bit of black around the margin, and I was very surprised that when kept in a bowl for days or weeks, it seems to have reproduced by fission. This probably explains why it has a variable number of radial canals. Photographed in an aquarium. The bell diameter was 10 mm.

Photos / Sounds

Square

What

Giant Pacific Octopus Enteroctopus dofleini

Observer

cemills

Date

January 1, 1980

Description

Recent hatchling of Enteroctopus dofleini, captured at night in the surface plankton. Photographed in an aquarium, total length about 5.5 mm. Date is approximate.

Distinguished from Octopus rubescens because O. rubescens hatchlings have two rows (paired) of chromatophores running down each arm, while E. dofleini hatchlings have a single row of chromatophores running down each arm.

Photos / Sounds

Square

What

East Pacific Red Octopus Octopus rubescens

Observer

cemills

Date

June 1, 1980

Description

Recent hatchling of Octopus rubescens, captured at night in the surface plankton. Photographed in an aquarium, total length about 6.5 mm. Date is approximate.

Distinguished from Enteroctopus dofleini because O. rubescens hatchlings have two rows (paired) of chromatophores running down each arm, while E. dofleini has a single row of chromatophores running down each arm.

Photos / Sounds

Square

What

Greater Moon Jelly Aurelia labiata

Observer

cemills

Date

November 25, 1987

Description

Single scyphistoma polyp of Aurelia labiata, in the process of strobilation, creating larval medusae that will be released one by one from the top of the polyp. The medusa at the top of the stack, with manubrium and mouth facing upward in this photograph, is nearly ready to release and swim off. Collected from under the dock, photographed in an aquarium.

Photos / Sounds

Square

What

Greater Moon Jelly Aurelia labiata

Observer

cemills

Date

November 25, 1987

Description

Pair of scyphistoma polyps of Aurelia labiata; the individual on the right seems to be beginning the process of strobilation, forming a stack of larval jellyfish that will eventually be released one by one. Collected from under the dock, photographed in an aquarium.

Photos / Sounds

Square

What

Greater Moon Jelly Aurelia labiata

Observer

cemills

Date

November 25, 1987

Description

Single scyphistoma polyp of Aurelia labiata, with open mouth. Collected from under the dock, photographed in an aquarium.

Photos / Sounds

What

Red-eye Medusa Polyorchis penicillatus

Observer

cemills

Date

October 10, 1979

Description

Photographed in an aquarium. Polyorchis spends much of its time sitting on the bottom. The food bolus in the manubrium was picked up in the sediments during the photo session. Bell height was about 40 mm.

Photos / Sounds

Observer

cemills

Date

August 14, 1993

Description

Most of the Maeotias medusae were on the bottom, a few were up swimming, in the boat turning basin, Petaluma River, Petaluma, along with (fewer) Blackfordia virginica. Both are exotic, introduced species of hydromedusae, both thought to be native to the Black Sea. Photographed in an aquarium; bell diameter was about 25 mm.

Photos / Sounds

Square

Observer

cemills

Date

July 17, 1972

Description

Collected recently washed up on Salmon Creek Beach, Sonoma County, on July 5, 17, 18, and 20, 1972. Photographed in an aquarium; bell diameter was 15 mm.

This is one of the original specimens on which the description was based and one of my first ever jellyfish photographs. I decided to put it up so you can see what some of the globs of jelly that people are finding on the beaches really looked like when they were alive.

Photos / Sounds

Square

Observer

cemills

Date

September 7, 1983

Description

Photographed in an aquarium; bell diameter is 70 mm.

Photos / Sounds

Square

Observer

cemills

Date

June 15, 1985

Description

About 9 mm in diameter. Photographed in an aquarium.

Photos / Sounds

Square

Observer

cemills

Date

August 15, 1993

Description

Mature medusa 9 mm diameter, from the Petaluma River, photographed in an aquarium. This is an introduced species, thought to originate in the Black Sea.

Photos / Sounds

Square

Observer

cemills

Date

February 23, 1985

Description

Photographed in an aquarium; the body is 18 mm long. Note the tentacle sidebranches are normally held tightly coiled, like beehives. This species is a fast and maneuverable swimmer.

Photos / Sounds

Square

Observer

cemills

Date

July 14, 1980

Description

Photographed in an aquarium. Note slumping gonads in response to gravity, so this is the right orientation in this case. The bell is about 20 mm tall.

Photos / Sounds

Square

Observer

cemills

Date

May 5, 1984

Description

Photographed in an aquarium. Bell is 20–25 mm tall.

Photos / Sounds

Square

Observer

cemills

Date

November 6, 2019 06:56 PM PST

Description

A fairly small one, about 5 cm long, as photographed in an aquarium.

Photos / Sounds

Square

What

Orange-striped Jelly Gonionemus vertens

Observer

cemills

Date

July 18, 1985

Description

About 25 mm bell diameter. Collected near a bedrock shore amongst Laminaria kelps at low tide. Photographed in an aquarium.

Photos / Sounds

Square

Observer

cemills

Date

June 18, 1985

Description

Several species of Pandalus (shrimp) larvae ride Proboscidactyla flavicirrata medusae (diameter about 7 mm) in the late spring in the Salish Sea surface waters.

Photos / Sounds

Square

Observer

cemills

Date

September 27, 1979

Description

About 6 mm tall. Photographed in an aquarium.

Photos / Sounds

Square

Observer

cemills

Date

June 18, 1996

Description

About 9 mm tall.

Photos / Sounds

Square

What

Umbrella Jelly Eutonina indicans

Observer

cemills

Date

August 5, 1980

Description

About 25 mm diameter.

Photos / Sounds

Square

Observer

cemills

Date

September 7, 1983

Description

About 18 mm diameter, with a hyperiid amphipod clinging to the inside of the bell. Photographed in an aquarium.

Photos / Sounds

Square

Observer

cemills

Date

July 1, 1986

Description

Half-mature medusa 12 mm tall. Captured at the surface in Friday Harbor in early July 1986 and photographed in an aquarium.

Photos / Sounds

Square

Observer

cemills

Date

October 25, 1991

Description

Mature adult, about 15 mm tall.
I collected about 50 adults at the nearshore surface of Humboldt Bay at the Woodley Island Marina. These were transported to the laboratory and photographed several days later in an aquarium.

Photos / Sounds

Square

Observer

cemills

Date

September 15, 1991

Description

A rare visitor to the San Juan Islands, collected at the surface in Friday Harbor, photographed in an aquarium. Bell diameter was 29 mm.

Photos / Sounds

Square

Observer

cemills

Date

July 17, 1999

Description

Very low intertidal on kelps, collected in July 1999. This is an undescribed species of Haliclystus. It seems to have disappeared from this location in the last two decades, which now hosts many thousands of kayak launches every summer, leaving the water stirred up, with lots of floc on the shallow flora that used to host this stalked jellyfish.

Photos / Sounds

Square

Observer

cemills

Date

July 15, 2003 02:13 PM PDT

Photos / Sounds

Square

Observer

cemills

Date

October 25, 1991

Description

Mature adult, about 15 mm tall.
I collected about 50 adults at the nearshore surface of Humboldt Bay at the Woodley Island Marina. These were transported to the laboratory where I was able to grow the small solitary polyps from spawned eggs and sperm, thus rounding out the life history of this species.

Mills, CE 2000. Sci. Mar. 64 (supl): 97-106.

Feeds: Atom