Leonard Ho
  • I'm a passionate aquarist of over 30 years, a coral reef lover, and the blog editor for Advanced Aquarist. While aquarium gadgets interest me, it's really livestock (especially fish), artistry of aquariums, and "method behind the madness" processes that captivate my attention.

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Recent Content

Octopus genome finally sequenced

Octopus bimaculoides, also known as the Californian two-spot octopus, whose genome was sequenced. The Californian two-spot octopus is immediately recognizable from the blue spots on either side of its head.

Colorado-inspired Aquascaping

This aquarium is essentially a nontraditional Iwagumi aquascape a style which focuses on the rock formations, which was pioneered by the late, great Takashi Amano.  The critical choice of rocks and their composition define this aquascape as uniquely Colorado.

Dead corals do tell tales


Dead corals do tell tales


Strange brain coral colonies

Massive corals (corals that grow in boulder-like formation such as brain corals) can tell scientists a lot about the coral’s history as well as the history of the reef site. 

Stressing parent corals can produce stronger coral babies


Stressing parent corals can produce stronger coral babies


Pocillopora damicornis. Credit: Hollie Putnam

From the University of Hawai’i — Mānoa



Parental experience may help coral offspring survive climate change

A new study from scientists at the University of Hawai’i — Mānoa’s (UHM) Hawai’i Institute of Marine Biology (HIMB) reveals that preconditioning adult corals to increased temperature and ocean acidification resulted in offspring that may be better able to handle those future environmental stressors.

RIP Takashi Amano


RIP Takashi Amano


The man. The legend.

We have lost a true giant in our hobby.  Amano’s influence has been immeasurable, elevating the art of aquascaping to unfathomable heights.  If you are one of the few people who hasn’t been graced by Amano’s brilliance, we ask you to simply google “Takashi Amano.” 

Some fish like it hot!


Some fish like it hot!


Maroon clownfish. Photo by Jenny Huang.

Researchers placed juvenile maroon clownfish (Premnas biaculeatus) into 28.5°C (83.3°F) and 31.5°C (88.7°F) seawater.  These temperatures represent +1.5°C (+2.7°F) and +3.0°C (+5.4°F) over present-day mean temperatures (27°C/80.6°F) respectively.

New Danio species


New Danio species


Photos of preserved male (top) and female (bottom) specimens of Danio annulosus. Live specimens are similarly colored.

Type locality for Danio annulosus
Type locality for Danio annulosus

2015 has been a very busy year when it comes to new Danio species from southern Asia (India, Nepal, and Bangladesh).