9 mm long, found under a low intertidal cobble. Scanned from a 35 mm slide taken by Jim Lance of the single individual of this species I found at Santa Cruz de Miramar, Nayarit, Mexico.

The 2nd and 3rd images show the extensive boulder field at Santa Cruz de Miramar, where Jim Lance, Gale Sphon and I found a total of 15 species of heterobranch sea slugs on this date in 1985.

Orienthella sp. with eggs was located on reef wall at a depth of 10 feet. Length was not measured. Water temperature was 62 degrees F.

Note that this variation has an inconsistent white stripe on the dorsum and cephalic region, contrasting with O. trilineata that has a continuous stripe. Also note that O. cooperi may have inconsistent white stripe, but O. cooperi does not have annulate rhinophores.

This animal was located on reef at a depth of 60 feet. Length was 1 cm. Water temperature was 53 degrees F.

This animal appears to be D. davebehrensi. Oral tentacles were not observed indicating the genus Doriopsilla. The gill is white, as in D. davebehrensi, but the animal is more oblong and the rhinophores are longer than typically observed and the mantle skirt does not appear to extend laterally beyond the foot. Doriopsilla davebehrensi has the dispersal potential to reach the islands (Hoover et al, 2015). Bertsch (2019) reports that D. davebehrensi is rarely found at the islands and is common along the coast at Bahía de los Ángeles.

BERTSCH, H. 2019. Biodiversity and natural history of Nudipleura communities (Mollusca, Gastropoda) at Bahía de los Ángeles, Baja California, Mexico. A 30-year study. Geomare Zoológica, 1: 89-136.

HOOVER, C.A., LINDSAY, T., VALDÉS, Á., GODDARD, J.H.R. 2015. Seeing double: Pseudocryptic diversity in the Doriopsilla albopunctata – Doriopsilla gemela species complex of the north-eastern Pacific. Zoologica Scripta, 44(6): 612-631.

Found crawling on mud flats at low tide. Photo five shows defensive response when touched from behind: it flared its cerata and then buried itself. Videos of it cruising, digging, and burrowing here: https://flic.kr/s/aHsmJBURnQ

The image is of a pair of freckled dorid nudibranchs (Peltodoris lentiginosa) sitting on top of a population of cloud sponges (Aphrocallistes vastus) at a glass sponge reef.

P. lentiginosa is one of only two species of nudibranchs (the other being Doris odheri) that has been scientifically confirmed (specimen samples, gut contents & fecal contents analysis) to eat glass sponges in the northeast Pacific Ocean.

Even though glass sponges are abundant throughout the world's oceans, the only other record of a glass sponge predator comes from Antarctica from the 1970's.

http://onlinelibrary.wiley.com/doi/10.1111/j.1744-7410.2012.00262.x/full

Images showing two of four individuals which showed up recently in the filter beds of the seawater system at UCSB's Marine Operations Facility. The water is pumped in from a depth of 55' off of Campus Point, and the nudibranchs were likely pumped in as larvae.

One of the very few species of terrestrial mollusk found at Pinnacles National Park, these snails spend their days hiding deep in rock crevices, apparently only coming out on cool, humid evenings. This pair was discovered mating.

@oksnaillaboratory , @susanhewitt , @pliffgrieff , @tlawson , @euproserpinus I thought this would be a sighting you all would especially appreciate.

This brilliant colour is caused by IIV-31 (Isopod Iridescent Virus). I've been checking hundreds of pill bugs over several years for this unusual phenomenon and my persistence finally paid off!
Sadly, this total colour change is usually the later stage of the virus; once a pill bug is this bright it generally doesn't have much longer to live.

Hundreds of B. gouldiana were present in the shallow lagoon just inside of the cobble field at Naples, with individuals measuring up to 50 mm total length.

This is a continuation of a population bloom of B. gouldiana at Naples that started last fall, the first time I have seen this species at Naples since beginning regular sampling there in 2006.

So far, there has been no sign of reproduction, but I expect to find their egg strings pretty soon.

More popularly known among divers as sheep nudibranch (although it isn't a nudibranch), this sapsucking slug is associated with the algae, Avrainvillea sp. (especially A. erecta and A. longicaulis). They grow to only 5-7mm in length.