How big are fish eggs?

Fish eggs come in a wide variety of sizes, depending on the species of fish. Here's a general overview:

Very Small:

* Planktonic eggs: These are microscopic and float freely in the water column. They are common in many species of fish, including cod, herring, and tuna.

* Some freshwater fish eggs: Some species of freshwater fish, like minnows and darters, lay eggs that are barely visible to the naked eye.

Small:

* Many freshwater fish eggs: Fish like bass, catfish, and trout lay eggs that are about the size of a grain of rice or a pinhead.

Medium:

* Salmon and trout eggs: These eggs are about the size of a pea or a small marble.

Large:

* Sharks and rays: These fish lay eggs that are often several inches long and resemble a purse or a spiral.

Factors affecting egg size:

* Species: As mentioned above, the size of the eggs is highly dependent on the species of fish.

* Water temperature: Warmer water can lead to smaller eggs.

* Nutrient availability: Abundant nutrients can lead to larger eggs.

* Egg development stage: Eggs get bigger as they mature.

Note: Some fish species, like seahorses, have unique methods of caring for their eggs, often carrying them in pouches or on their bodies until they hatch.