The POCUS Kingdom
Ultrasonography is a visual discipline and metaphors relating to familiar analogous items such as animals make recognition of normal and abnormal images easier. They also serve as teaching aids, enhancing memory retention of the learners. Some authors use the term “ultrasound pareidolia” to describe this concept. The ‘POCUS Kingdom’ section is dedicated to such interesting comparisons.
Kidney and Bladder
Another Dromedary hump 
Twin kidney appearance: perinephric hematoma 
ACKD = acquired cystic kidney disease
Other abdominal organs
Another Portal triad 
Gall bladder and portal vein appearing like an exclamation mark! 
Another example looking more like a goat head 
Heart
“Swinging heart” in pericardial effusion: echo equivalent of electrical alternans 
Arrows point to pulmonary veins
Lung
Another whale tail + spine sign 
Curtain sign: Normally aerated supradiaphragmatic lung (A-lines) moving over the diaphragm and liver/spleen. Usually lost in pleural effusion/basal consolidation.
Vascular and others
Police siren sign: alternating red-blue pattern (only D-wave below the baseline) indicating severe hepatic vein congestion