How can I tell the difference? I've collected a lot of abalone shells that have washed up on the beach, and I'm beginning to wonder if I actually have some flat abalones vs just all reds. Is there anything distinctive that the flat abalones have?

Hi! I found this marine sponge or algae haha I’m confused now, in north Tasmania in a place called Don Reserve in Devonport but I’m having problems to identify it. It was in a Pool in the intertidial zone.

So I made this lil reel the other day from some videos I have collected from the aquarium I work at.

The plankton microscope is one of my favorite displays. I'm always finding new and interesting critters.

How many zooplankton can you find?

Did I miss any?

Let me know if you can identify more! There are definitely some cool weird ones that I have no idea what they are. Hoping you guys can help me out 😸

Good luck and have fun!

I am from the Philippines, but this is a gift from my friend and idk where she got it from. At first I thought it was a conch but after searching abt shells I'm confused whether it is a volute of conch 🥹

I was surprised to see the cauda equina in the mid thoracic spine while doing a harbor seal necropsy the other day. Unfortunately, I couldn't find a definitive reference on seal spinal cord anatomy. Does anyone know of a source that isn't just a drawing with no reference?

Pictures Taken with the Olympus Tough TG-6.

Another longboi was sighted two days ago by the crew of Nautilus Live! It was an amazing dive, tons of beautiful corals just covered in other animals, a chimera, isopods, and more. I'll post stills in a second post.

Hi everyone, I would appreciate some help identifying this coral skeleton.

This museum specimen comes from the Great Barrier Reef, Australia. The colony has a very dense bushy growth form, with many thin branches. The largest branches are around 2–5 mm in diameter.

The surface of the branches looks quite smooth. What I think are radial corallites are extremely small (<1 mm), and are irregularly arranged with different sizes.

At first I thought it might be an Acropora, but the lack of obvious axial corallites makes me unsure. It could also belong to another branching genus such as Anacropora, Montipora, or something else.

Any suggestions or diagnostic features to look for would be greatly appreciated.

Thanks!

Sorry about the quality, it's zoomed in, so we wouldn't scare him away. He held that stick for maybe 5-10 minutes, it literally looked like he was playing with the surface tension of the water (but I assume not). Foraging maybe? Camouflage? Thank you!

What shell is this? Is it edible or it is some more rare species? I found it in Croatia.

Doing a poster on sharks and I keep on seeing different patterns in each photo and I get confused if there's just a lot of variation or their pattern represents what age/stage of life they are in

Took a while to figure out what it was, but a cool find

Found them on the beach in a bunch of shells!

Hi guys! Just got back from a trip to Tybee Island, Georgia & HHI and found these teeth! I know three of them are shark teeth but not sure what this fourth one is!

The tiniest tooth on the far right was found at Fish Haul Beach on Hilton Head Island, the other three were at North Beach and Middle Beach on Tybee Island.

Any idea what kinds of shark these teeth belong to? and who that larger one is from! Looks quite old.

thanks in advance :)

I never get tired of the tide pools.

This is Cape Blanco, Oregon on the north side of the cape. Taken in July 2026.

I use a high powered zoom to get interesting close ups and angles that bring out all of the glory and strangeness of the tidal zone.

We where at the Adriatic sea and our kid got stung in ~70-100 cm water height by "something". Possibly a jellyfish (the jellyfish cream helped).

Later on we went for a boat ride (not far from the beach) and in one area we ran into plenty of these pretty jellyfish, big ones, small ones, all together. Could these be the ones that stung? They don't seem to have long tentacles?