Anybody got any good science-y questions about loaches? I'm thinking about possible research/independant study topics involving loaches.
Are their spines venomous?
What aspect of their immune system makes them seemingly more susceptible to internal parasites?
Do they have stronger chemical mucosal defenses than fish with scales to make up for their apparently weaker barrier defenses?
What is their hemoglobin's affinity for oxygen? (Fish in high oxygen waters tend to have hemoglobin with less affinity for oxygen)
What is their gill surface area like? Higher, because they are active and need to swim fast in their high-flow invironment, or lower, because they live in naturally high-oxygen environments?