Systems Thinking

Fossa Method

Not answers, but principles for finding them.

May 31, 2026 · 9 min

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Flying Elephants
What Is Your Evidence?
Fossa Method
Scientific Method. A Practical Guide.
Gas Bubble Disease. Part II. Consequences.
Fish coccidia: Goussia
Cryptococcus-like structures in fish
Fungal structures in fish: colonization or invasive process
Granulomatous lesions in fish: a histoplasma-like case
Granulomas and intracellular agents in fish
Fin Rot
Hexamitids Without Myths
Ichthyophthiriosis Without Myths
Patient Size Doesn’t Matter — Why Fish Don’t Die From Diagnostics
Simple Rules for Working with Aquarium Fish
Surgical Procedures on Aquatic Animals
Is It Ever Too Late for a Fish Autopsy?
Two Sides of One Dosage
Initial Diagnostics After Fish Transportation
Gas Bubble Disease: It's Not About the Bubbles
The Smear Comes First.
Cryptocaryon irritans: Not Just White Spots
Bubble formation
Bubble formation
Ciliated Epithelium of the Kidney
Ciliated Epithelium of the Kidney
Ciliates and Bacteria on Fish Surfaces
Ciliates and Bacteria on Fish Surfaces
Cryptobia Moving Through Detritus
Cryptobia Moving Through Detritus
Cryptocaryon irritans in gills
Cryptocaryon irritans in gills
Diagnostic Thinking
Division of Ichthyophthirius multifiliis
Division of Ichthyophthirius multifiliis
Division of Ichthyophthirius multifiliis
Fin ray structure
Fin ray structure
Fish necropsy
Fish necropsy
Fungal Hyphae in Fish Tissues
Fungal Hyphae in Fish Tissues
Fungal Structures in a Native Preparation
Fungal Structures in a Native Preparation
Heart of an Amur Sleeper Larva Under the Microscope
Heart of an Amur Sleeper Larva Under the Microscope
Ichthyobodo spp.: Comparing Morphotypes
Ichthyobodo spp.: Comparing Morphotypes
Loeffler vs Ziehl–Neelsen
Loeffler vs Ziehl–Neelsen
Pigment or Cocci?
Pigment or Cocci?
Praziquantel in Water
Praziquantel in Water
What 'many hexamitids' actually looks like
What 'many hexamitids' actually looks like