I think that this is a baby
Found on Hippocampus erectus (Seahorse) that was held in captivity for roughly a month before release. The seahorse was at Fort Wetherill when it was being washed in and I don’t know if this sea slug came in with it/hitchhiked or not.
Observé lors du relevé du chalut de fond par MPO Québec / Observed on a bottom trawl survey by DFO Quebec. z = -81 m.
Observé lors d'un relevé au chalut du MPO-Québec / Observed during a trawl survey by DFO-Quebec. Specimen: 2391, collection IML: 12912, materialsampleID: T_24_00352, z = -72 m
Spider crab shells from a mass moult brought ashore by tidal action...covered beach for hundreds of yards, as much as 3 feet deep
Holotype (CASIZ 182590), 33 mm long as shown here, on which Terry Gosliner based his 2010 description of this species (as Flabellina goddardi). I found it on a calm and bright overcast morning crawling in the open in a low intertidal pool at Tar Pits Reef. The 2nd image shows the egg mass, 14 mm in diameter, laid by this individual on 10 May 2008. The uncleaved zygotes averaged 65 microns in diameter, were packed one per capsule, and took 7 days at an average of 16 degrees C to develop into hatching planktotrophic veligers. The 3rd image shows, in right ventro-lateral view, one of the veligers just prior to hatching and with a shell 105 microns long.
Unlike most specimens of this species observed subtidally, individuals found intertidally vary in possession of white lines on the body and cephalic tentacles from completely absent (as in this specimen) to incomplete, to complete. With those white lines, subtidal specimens have occasionally been mistaken for Coryphella trilineata.
Approx. 4 individuals in a patch of flotsam. Very nice surprise!
Un petit tunicier échantillonné d'un pétoncle d'Islande lors d'un relevé par MPO-Québec / a small tunicate collected from an Icelandic scallop during a survey by DFO-Quebec. Collection IML no. 12897. Source: Chantal Méthot.
Not my observation: posted with the permission of Simon Hickman, who is not an iNat user, who found this on Lambert's Cove beach, West Tisbury. Presumably, it arrived at our latitude in a Gulf Stream eddy.
Found amongst some seaweed growing in the high intertidal zone
These crabs are quite common on the tidal flats in the North Eastham area, I've been seeing them for many years.
There's a paper, Phylogeny of the genus Pinnixa White, 1846 (Crustacea, Brachyura, Pinnotheridae) and allies inferred from mitochondrial and nuclear molecular markers, with generic reassignment of twenty-one species (By Emma PALACIOS THEIL & Darryl L. FELDER) - Link: https://sciencepress.mnhn.fr/en/periodiques/zoosystema/42/6 that contains a Morphological characteristic chart. The shape of the claws and male pleon align with Pinnixa cylindrica most closely.
There's another paper out there, THE OCCURRENCE OF PINNIXA CYLINDRICA (CRUSTACEA, PINNOTHERIDAE) IN THE TUBES OF THE LUGWORM, ARENICOLA CRISTATA (by John J. McDermott) - Link: https://www.jstor.org/stable/44112124 that describes Pinnixa cylindrica being found frequently alongside the Lugworm. There are many American Lugworm in the area as evidenced by their egg 'jellies'.
There are a few Cape-area Pinnixinae on iNat already, I believe these are also Pinnixa cylindrica:
Observé lors d'un relevé de pétoncle du MPO-Québec / Observed during a scallop survey by DFO-Quebec.
Found 2 nearly identical individuals, both about the same size as sea lemons (~20-30mm) but seemingly smooth. Coloring was clear/opaque with purple/maroon interweaving lines.
Male and female, poss mating.
Caught in Scarborough tidal river with dip net.
Caught in Scarborough tidal river with dip net.
I. Cruzii formerly - as a junior synonym.
These do not exist there in these numbers anymore, owing to - probably - diver numbers and probably bottom dwelling elasmobranchs. They exist elsewhere along the reef system.
Observed on a survey by the Greenland Institute of Natural Resources.
Three individuals were found on some Griffithsia
Sandbar shark in Nantucket Harbor
Depth approx 7.5 ft
Water temp approx 74 F
View full observation video: https://youtu.be/0fPHQTvw8L8
Part of The Harbors Video Project -- https://www.theharborsvideoproject.org
As can be seen in the 2nd image, the polyp appears to have some pinkish acoel flatworms feeding on the gonophores..
AZMP S27.
Collection IML: 12734, z = -173 m. Source: MPO-Christian Turcotte.
I decided to dig a little ways down a burrow about 0.5 inches in diameter which felt like it had compacted/slightly cemented walls. Similar burrows in the area were very deep and had multiple entrances. All were in ~4 inches of water at dead low tide. I felt this fish fleeing headfirst down the hole and trapped it with my index finger against the burrow wall, maybe 7 inches down and pulled it out after digging down with my other hand to make some space to maneuver. I think the burrow continued deeper but I did not dig any more after pulling the fish out. I suspect that the burrow was made by the mud shrimp Upogebia affinis. I posted an exoskeleton from that species from the same location a little while ago and found another during this trip. I saw another goby maybe 1.5 cm long later in the day but didn’t catch it.
Had extremely good luck finding a ton of these really small horseshoes.
Observé lors d'un relevé au chalut de fond par MPO-Québec, collection IML no. 12357 / Observed during a bottom trawl survey by DFO-Quebec. MLI museum no. 12357. z = -103 m.
https://www.boldsystems.org/index.php/Public_RecordView?processid=PIMI075-23
Images show two specimens, each about 2 mm long, one found by Larry Harris, the other by JG, both on the ctenostome bryozoan Amathia dichotoma. The egg mass in the 3rd image measured 1.9 mm long and was spotted by Walter Lambert on a piece of drift eelgrass collected from the same site.
Images show three of the five total specimens found on drift eelgrass and Sargassum this morning during a Rapid Assessment Survey of marine invertebrates and algae in a marina in Westport, MA.
On Membranipora membranacea growing on a blade of kelp. Egg mass in 3rd image was 6.1 mm in diameter.
The 5th image shows their silt tubes on the underside of a piece of drift Ascophyllum.
2.5 mm long; found with egg masses on Obelia growing on kelp Saccharina.
DRM-JG-01
Found ingesting a polychaete worm in a shallow, low intertidal pool lined with recently settled Blue mussels.
Silver Hake in Cape Cod Bay
Depth approx 60' (18 m)
Surface temp: 63 F (17 C)
Est. temp at depth: 49 F (9 C - based on other cameras in the area)
View full observation video: https://youtu.be/NYxxTVVz86s
Part of The Harbors Video Project -- https://www.theharborsvideoproject.org
Found in a low intertidal pool.
'Hedgehog' amphipod sampled on the DFO-Quebec northern Gulf of St. Lawrence bottom trawl survey. MLI museum no. 12471 / Un amphipode « hérisson » échantillonné dans le cadre du relevé au chalut de fond du nord du golfe du Saint-Laurent du MPO-Québec. Collection IML no. 12471. z = -87 m.
Fishes and invertebrates sampled during the 2022 DFO multispecies survey in Baffin Bay and Davis Strait (NAFO Subarea 0). z = -1299 m. MLI museum no. 12285.
10 mm long. 2nd image shows as found, floating on surface of a low intertidal pool.
Counted ten individuals. So cool!!
Three individuals, 7 to 10 mm long, with their egg masses on Obelia, collected from New Harbor on 4 April.
The 3rd image shows an egg mass laid on 9 April, with two of its encapsulated zygotes (95 microns in diameter, in capsules 182 x 129 microns) shown in the last image. Easter eggs!
6 mm long crawling. Sac-shaped egg mass (3rd image) 0.9 mm wide. Zygote (4th image) 85 microns in diameter, shown with three mostly clear polar bodies in an egg capsule measuring 143 x 110 microns; a still swimming spermatozoon is visible at upper right in this image.
With its predator, the nudibranch Onchidoris muricata.
Exemple d'une méduse observée par MPO-C. Turcotte lors du relevé du plancton du PMZA-TL au bonnet Flamand, mis en collection IML no. 11974 / Example of a medusa observed by DFO-C. Turcotte from a AZMP-NL plankton survey at Flemish Cap, put in collection IML no. 11974. z=1000 m
Organismes inconnus observés lors d'un relevé de chalut de fond par MPO-Québec / Unknown organisms observed during a bottom trawl survey by DFO-Quebec. Observation: @marilynthorne. z= -174 m
Bryozoaire sur un coquille observé lors d'un relevé de pétoncle par MPO-Québec / Bryozoan observed on a shell during a scallop survey by DFO-Quebec.