Favoritos de ajustinfocus

• Animals Kingdom Animalia
• Chordates Phylum Chordata
• Sharks and Rays Class Elasmobranchii
• Rays Order Rajiformes
• River Stingrays Family Potamotrygonidae
• Genus Raja
• raya gigante Raja binoculata

Globally near threatened (NT)

The big skate is found in the northeastern Pacific Ocean, from the eastern Bering Sea and the Aleutian Islands, as far south as central Baja California. It occurs in coastal bays, estuaries, and over the continental shelf, usually on sandy or muddy bottoms, but occasionally on low strands of kelp. It is usually is found no deeper than 120 m (390 ft). It frequents progressively shallower water in the northern parts of its range. This species is abundant off British Columbia, where it prefers a depth of 26–33 meters (85–108 ft) and a temperature of 7.6–9.4 °C (46–49 °F).

Filmed during a night lighting science activity with the San Juan Nature Institute to study plankton and University of Washington Friday Harbor Labs.

Photo license and credit belong to the Florida Museum of Natural History (FLMNH), the Hakai Institute, and MarineGEO | http://specifyportal.flmnh.ufl.edu/iz/ | Field Number: BHAK-6911 | This observation is a part of the collaborative work between FLMNH, the Smithsonian Institution's Marine Global Earth Observatory (MarineGEO) and Tennenbaum Marine Observatories Network, the Smithsonian's National Museum of Natural History, and the Hakai Institute

Nudibranch Coryphella trilineata (northern form, about 10mm long) & look-alike amphipod Podocerus cristatus. Scanned from a 35 mm slide I took in the lab in 1984. I had found the specimens in close proximity to each other a few days earlier in the low intertidal at Middle Cove, Cape Arago, Oregon. The amphipod (and her recently hatched juveniles, visible at lower right when viewed large) are on a piece of the outer tube of the polychaete Pista elongata; the slug is on a piece of the hydroid Abietinaria.

Notice the white head tentacles of the slug and the white antennae on the amphipod. Here's what one form of the amphipod looks like in central California, where the southern form of O. trilineata ( with chromium orange on their rhinophores and cephalic tentacles) is prevalent: https://www.inaturalist.org/observations/1103734

Farther south, near Puerto Vallarta, MX, the amphipod lacks white lines, just like the abundant local aeolids (see Fig. 1f-h in paper here: https://www.researchgate.net/publication/282252603).

I’ve been assuming these little guys I see sometimes are just larval D. opalescens but I don’t actually know what all other species are in the area so want to look into a little more/hear from folks before specifying it down

Pointed out to me by a couple of birders, who suggested it had been “caught by the low tide". They moved it atop the rock.

Compellingly beautiful creature, the photo does not do it justice.

Seek could not identify, even to order.

Of the two species in these waters, looks much more like a Humboldt than an Opalescent.