Mastodawn

Starting this week, including this feed.
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#nudibranch #seaslug #nudibranquio #babosademar #tulamben #underwaterbiology #marinebiology #nature #natureportrait #macro #macronature #uwmacro #underwatermacrophotography

Hank Sep 25, 2025

A tiny showstopper from Dauin, Philippines: Nembrotha guttata (nudibranch) gliding across the sand, midnight black with neon orange spots and blue rhinophores.

https://www.youtube.com/shorts/z5WHzNTlROI

#nudibranch #seaslug #NembrothaGuttata #macro #underwaterphotography #Dauin #PhilippinesDiving #UWmacro #ocean #marinelife #nature

Nembrotha guttata—midnight body, neon orange polka-dots; filmed in Dauin. #nudibranch #seaslug

YouTube

Shallow Reef May 27, 2024

CatchOfTheDay:
Pseudoceros ferrugineus

AKA:
Fuchsia Flatworm

PhotoLookUp:
gbif.org inaturalist.org

MyLocalDiveShop:
aaronsdiveshop.com

#coralreef #dive #macrophotography #marinelife #ocean #scuba #scubadiving #uw #uwmacro #uwphotography

#hawaii #oahu

Shallow Reef Apr 23, 2023

CatchOfTheDay: Pregnant Rapipontonia galene

AKA:
Hydroid Shrimp

PhotoLookUp:
gbif.org inaturalist.org

MyLocalDiveShop:
aaronsdiveshop.com

#coralreef #dive #macrophotography #marinelife #ocean #scuba #scubadiving #uw #uwmacro #uwphotography

#hawaii #oahu

Shallow Reef Feb 13, 2023

CatchOfTheDay:
Babakina indopacifica

PhotoLookUp:
gbif.org inaturalist.org hawaiisfishes.com marinelifephotography.com seaslugsofhawaii.com seaslugforum.net fb/nudibase

MyLocalDiveShop:
aaronsdiveshop.com

#coralreef #dive #macrophotography #marinelife #ocean #scuba #scubadiving #uw #uwmacro #uwphotography
#seaslug #nudibranch
#hawaii #oahu

Shallow Reef Feb 6, 2023

CatchOfTheDay:
Undescribed Costasiella sp.#3

PhotoLookUp:
gbif.org inaturalist.org seaslugsofhawaii.com seaslugforum.net fb/nudibase

MyLocalDiveShop:
aaronsdiveshop.com

#coralreef #dive #macrophotography #marinelife #ocean #scuba #scubadiving #uw #uwmacro #uwphotography
#seaslug #nudibranch
#hawaii #oahu

Shallow Reef Feb 6, 2023

By far my most impressive UW sight in over 25 years diving:

CatchOfTheDay:
Octopus sp. 16

AKA:
Hairy Octopus

PhotoLookUp:
gbif.org inaturalist.org

MyLocalDiveShop:
aaronsdiveshop.com

#coralreef #dive #macrophotography #marinelife #ocean #scuba #scubadiving #uw #uwmacro #uwphotography

#hawaii #oahu

Shallow Reef Jan 29, 2023

CatchOfTheDay:
Idiotropiscis lumnitzeri

AKA:
Sydney's Pygmy Pipehorse

PhotoLookUp:
gbif.org inaturalist.org

MyLocalDiveShop:
frogdive.com.au

#coralreef #dive #macrophotography #marinelife #ocean #scuba #scubadiving #uw #uwmacro #uwphotography

#australia #sydney

Cetra Dec 22, 2022

A few nudibranchs colloquially known as "salt & peppers" (officially known as St Vincent's nudibranch / Hypselodoris saintvincentia) clustering on what appears to be eggs.

#shoredive #coral #coralreef #dive #diver #diving #macro #macrophotography #marinelife #ocean #oceanlife #reef #scuba #scubadiving #underthesea #underwater #underwaterphoto #underwaterphotography #underwaterworld #uw #uwmacro #uwphotography #nature #seaslug #nudibranch

Shallow Reef Oct 7, 2022

CatchOfTheDay:
Halicampus edmondsoni

AKA:
Edmondsoni Pipefish

PhotoLookUp:
gbif.org inaturalist.org hawaiisfishes.com

MyLocalDiveShop:
aaronsdiveshop.com

#coralreef #dive #macrophotography #marinelife #ocean #scuba #scubadiving #uw #uwmacro #uwphotography #hawaii #oahu