Julian Sprung is a biologist, author, photographer, aquarium design consultant, and a partner in the aquarium industry manufacturing and publishing company, Two Little Fishies, Inc. Julian graduated from the University of Florida with a Bachelor of Science degree in Zoology in 1988. Since 1988 he has written the column "Reef Notes" in Freshwater and Marine Aquarium magazine, and he was Science Editor from 1993 to 1995 for Aquarium Frontiers.

In 1991 Julian wrote and narrated the video, An Introduction to The Hobby of Reef Keeping , which was the first product of Two Little Fishies, Inc, the company he formed with Daniel Ramirez. Two Little Fishies now publishes books and CD ROM'S, and manufactures a variety of popular aquarium products and foods for fishes and invertebrates.

Julian's Reef Notes, Revisited and Revised , is a compilation of "Reef Notes" question and answer columns plus additional notes pointing out changes of opinion or errors.

Two Little Fishies' Oceanographic Series guides include Julian's Corals: A Quick Reference Guide , Invertebrates: A Quick Reference Guide , and Julian's latest book, Algae: A Problem Solver Guide .

A common theme in Julian's approach to aquarium keeping is to study the living ecosystem while keeping the technical support system simple. By promoting this philosophy he intends to increase the enjoyment of the hobby and attract those who might otherwise be deterred by the cost and complexity of "high-tech" aquariums.