r/marinebiology

I’ve been reading this sub for years but this is my first post. what are the alien egg looking things? Same pic, one closeup.

[see attached screenshot]

I am on the southeast coast of Mallorca (Portocolom), and yesterday took a wonderful boat trip around the calas. The captain who runs the trips is very respectful and knowledgeable of the natural area, but even he in all his years of running his boats around the calas has never seen this before, and so couldn't identify these fish swimming in pairs on the surface. This was perhaps 30 meters from the beach line.

One of the other passengers and I took an interest - we wondered if they were Mahi Mahi, but I don't think the dorsal fins match. The only other thing I could narrow them down to is swordfish (they seem the right length, colour, and dorsal fin), but do they go in pairs, and so close to the shore? Maybe the incoming Il Niño, or otherwise global warming is having an effect, who knows (maybe you do!)

Apologies for the terrible photograph, I didn’t think I’d be posting to Reddit. This was about 20-30cm long, clearly wriggling and changing direction, it took me some time to notice there was more to it than the sort of thread with sesame seed type bits attached. There’s a head end (top right) like a sort of transparent sausage.

Any ideas?

We are currently in Greece, in Chalkidiki; is this a dangerous jellyfish? Or is it harmless? It mostly moves with the current and seemingly by itself. The water is filled with countless super small ones (presumably babies?). Can you help me identify? :)

I’m sure one of you could tell me what this is! He was washed up today on a beach in Olympic National Park. Google says stingrays are rare up here in the Pacific so, is it a skate ray?

Hello! I work at a marine science center on the coast of GA and had a guest bring in a photo of something they saw on their beach walk this morning. I asked all of my colleagues what they thought it might be, but we couldn’t come to any solid conclusions. It looks like flesh of an animal that might’ve gotten caught up in a propellor. It doesn’t look like there is any hair present, so we ruled out it being from a whale. You can see fin-like structures and what seems to be fat tissue. Didn’t know if anyone had any idea what this could be!

This is my first GIS project. I'm currently self-learning GIS and hoping to start a degree in Environmental Science (UK) this year, with an aim to work in conservation (preferably marine) in the future.

I live in Wales and wanted to create a portfolio piece to start learning GIS, something relevant to me and the field i'd love to work in.

QGIS was used to make the map with data from JNCC (OGL v3.0), EMODnet Bathymetry 2024, Esri World Imagery, OS Open Data, Natural Resources Wales.

After I imported the map into Affinity Designer to add the details.

As this is my first attempt I'd really appreciate any feedback.

Found this in a sound in NC. My guess is turtle scute but it’s hard to find any imagery to confirm. Either that or some kind of bird bone I have no idea about. Thoughts?

Anyone know what’s happening in this photo? Yellow/green/brown haze around the shallows, suspended in the water (not a solid). Guessing some sort of phytoplankton.

Photos taken in Raja Ampat in April. Water temp in the shallows was about 32c.

inaturalist keeps just telling me it’s in the animal kingdom. is it a kind of tunicate perchance or eggs of some kind?

Our company took a day to walk the beach in SoCal and see what we could find. Did we miss anything?

A friend of mine just came back from a trip to Okinawa and brought this back with him. He thinks it’s a shark tooth thats solidified between two pieces of shells. Thoughts?

Just saw this advertisement on my Instagram since I follow parks project. They apparently collaborated with a brand called Sharkbanz and they make wearable bands that deter sharks while you are swimming.. I’m confused on how this would even work and if it actually causes more harm than good. I don’t plan on buying, I am just curious science wise

Found at Manasota Key, Florida, USA on Sunday. About 1 cm long.