HTML Entity Browser Test:

U+1F41F is the Unicode hex value of the character Fish, which is categorized as "other symbol" in the Unicode 6.0 character table.

Unicode Character Information
Unicode Hex U+1F41F
Character Name FISH
General Category Other Symbol [Code: So]
Canonical Combining Class 0
Bidirectional Category ON
Mirrored N
Unicode Character Encodings
Fish HTML Entity 🐟 (decimal entity), 🐟 (hex entity)
Windows Key Code Alt 128031 or Alt +1F41F1
Programming Source Code Encodings Python hex: u"\u1F41F", Hex for C++ and Java: "\u1F41F"
UTF-8 Hexadecimal Encoding 0xF09F909F
1 To type a Unicode symbol in Windows, hold down the ALT key and enter the decimal or hexadecimal code provided using the numeric keypad. The decimal alt code (Alt 128031) will only work on computers with support for this Unicode character in the active code page. The hexadecimal alt code (Alt +1F41F) will work for all Unicode characters provided Hex input from the numeric keypad is enabled.
* If the Fish character does not display correctly in your browser, you may not have a Unicode font on your system that supports this particular symbol.